datasheets/03/Series_90-30/90-30 Product Updates/Series 90
Contents
1. deadband limit Bit 4 Anti reset windup action When this bit is 0 the anti reset windup action uses a reset back calculation When the output is clamped this replaces the accumulated Y remainder value with whatever value is necessary to produce the clamped output exactly When the bit is 1 this replaces accumulated Y term with the value of the Y term at the start of the calculation In this way the pre clamp Y value is held as long as the output is clamped Bit 5 Enable derivative filtering When this bit is set to 0 no filtering is applied to the derivative term When set to 1 a first order filter is applied This will limit the effects of higher frequency process disturbances on the derivative term Installation in Hazardous Locations The following information is for products bearing the UL marking for Hazardous Locations e WARNING EXPLOSION HAZARD SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS I DIVISION 2 e WARNING EXPLOSION HAZARD WHEN IN HAZARDOUS LOCATIONS TURN OFF POWER BEFORE REPLACING OR WIRING MODULES e WARNING EXPLOSION HAZARD DO NOT CONNECT OR DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NONHAZARDOUS e EQUIPMENT LABELED WITH REFERENCE TO CLASS I GROUPS A B C amp D DIV 2 HAZARDOUS LOCATIONS IS SUITABLE FOR USE IN CLASS I DIVISION 2 GROUPS A B C DOR NON HAZARDOUS LOCATIONS ONLY 12 Important Product Information GFK 2123Q IC693CPU3742. 485 port Built in Ethernet Communications Ethernet built in 10 100 base T TX Ethernet Switch Number of Ethernet Ports Two both are 10 100baseT TX ports with auto sensing RJ 45 connection Number of IP Addresses SRTP and Ethernet Global Data EGD Channels 16 SRTP Channels Up to 36 SRTP TCP connections total consisting of up to 20 SRTP Server connections and up to 16 Client Channels Web Server Support Provides basic Reference Table PLC Fault Table and IO Fault Table data monitoring over the Ethernet network from a standard web browser Environmental and Agency Specifications Refer to nstallation Requirements for Conformance to Standards GFK 1179
3. PLUS Data Controller Type Single slot CPU module with embedded Ethernet Interface Processor Processor Speed 133 MHz ok rs Processor Type Embedded 586 LAN ore STAT Execution Time Boolean Operation 0 15 usec per boolean instruction CPU 374 PLUS Type of Memory Storage RAM and Flash Memory S User Memory total 240KB 245 760 Bytes Note Actual size of available user program memory depends on the amounts configured for R AI and AQ word memory types Discrete Global Memory G Internal Coils M Output Temporary Coils T System Status References S Register Memory R Analog Inputs A Analog Outputs AQ System Registers SR Timers Counters ee Hardware Support Battery Backed Clock Battery Back Up Number of months 1 2 months for internal battery installed in the power supply with no power 15 months with external battery IC693ACC302 Load Required from Power Supply 7 4 watts of 5VDC High Capacity power supplies recommended Hand Held Programmer CPU374 does not support Hand Held Programmer EZ Program Store Device Yes LINK ACT PORT 1 100Mbps e W Z x W I Lu So J LINK ACT PORT 2 100Mbps 10 100 ETHERNET Total Baseplates per System 8 CPU baseplate 7 expansion and or remote Software Support OOOO OZO Coprocessor Compatibility Communications Support S Protocol Support SNP and SNPX on power supply RS
4. and then establishes a new connection This can cause unexpected channel timeout errors 0190H or 0290H at the client The SRTP server errors in the Ethernet exception log are identified as Event 2 Entry 2 may be 001cH or 0021H EGD Command Range Failure Can When an EGD Command attempts a write operation to a bit mode PLC Write Partial To PLC Bit Memory reference memory range l Q T M SA SB SC where the amount of data be written exceeds the configured size of that reference memory the command will return failure status but partial data may be written into the reference memory The amount of partial data written depends upon the starting bit memory location and the data length as follows m If data starts on a byte boundary location 8 n 1 no partial data is written m If data does not start on a byte boundary location 8 n 1 and data exceeds the configured reference memory by 8 or more bits partial data is written from the starting location to the next byte boundary after the starting location If data does not start on a byte boundary location 8 n 1 and data exceeds the configured reference memory by less than 8 bits partial data is written from the stating location to the end of configured reference memory For a Write PLC Memory command this can occur when writing data into the target PLC For Read PLC Memory or Read Exchange commands this can occur when writing data received from the target PL
5. on CPU374 Server if Client is Lost REPP Does Not Save Results of Aborted PING If an SRTP client with open connections to a CPU374 server is power cycled or reset the server s TCP connection may remain open for a long time until the TCP keep alive timer expires once the client is restarted and attempts to reopen the communication If quick recovery of the connection is needed the AUP for TCP keep alive should be used to adjust the keep alive timer down to the desired maximum time for holding open the broken connection The station manager REPP command does not retain the results of a PING that is aborted due to error The PING results are reported when the PING is aborted but subsequent REPP commands give the results of the last successfully terminated PING STAT C Command Reports Invalid The station manager STAT C command reports the CPU374 as being Rack Slot Location located in Rack 0 Slot 15 instead of Rack 0 Slot 1 Multiple Log Events Intermittent SNTP Loss of Synchronization Reduced EGD Consumption with Large Numbers of Produced Exchanges SRTP Communication Delays PLC Fault Table Last Update Date and Time Spurious Ethernet Failure Error Web Server Failure Under Heavy Load Reference Table Web Page Restriction The Ethernet Interface sometimes generates multiple exception log events and PLC Fault Table entries when a single error condition occurs Under repetitive error conditions the exception
6. on the Config Word see page 11 Important Product Information 11 GFK 2123Q In table 12 13 on page 12 82 of GFK 0467M the Config Word row should be replaced with Ref 0012 Config Low 6 Bit 0 Error Polarity When this bit is 0 the error term is SP PV Word bits When this bit is 1 the error term is PV SP Setting this bit to 1 used modifies the standard PID Error Term from the normal SP PV to PV SP reversing the sign of the feedback term This is for reverse acting controls where the CV must go down when the PV goes up Bit 1 Output Polarity When this bit is 0 the CV output represents the output of the PID calculation When it is set to 1 the CV output represents the negative of output of the PID calculation Setting this bit to 1 inverts the Output Polarity so that CV is the negative of the PID output rather than the normal positive value Bit 2 When this bit is 1 the setpoint is removed from derivative calculation For details see the discussion on page 10 Bit 3 Deadband action When the Deadband action bit is 0 no deadband action is chosen If the error is within the deadband limits the error is to be zero Otherwise the error is not affected by the deadband limits If the Deadband action bit is 1 deadband action is chosen If the error is within the deadband limits the error is forced to be zero If however the error is outside the deadband limits the error is reduced by the deadband limit error error
7. regain communication at the former IP address use the manual corrective action described above Storing a HW Configuration containing default 0 0 0 0 or incorrect Ethernet addressing data to the PLC will result in loss of the Programmer connection and will require manual corrective action as described above LAN Must be Tree Not Ring The two Ethernet network ports on the Ethernet Interface must not be connected directly or indirectly to the same network device The hub or switch connections in an Ethernet network must form a tree and not a ring otherwise duplication of packets and network overload may result In this situation the Ethernet modules will continually reset Reporting of Duplicate IP Address The CPU374 does not log an exception or a fault in the PLC Fault Table when it detects a duplicate IP address on the network Multiple Zero Period EGD If more than one EGD produced exchange is configured for a production Exchanges May Not Produce period of zero the exchanges may not produce similar numbers of samples Similar Numbers of Samples Due to the way that scheduling occurs when multiple exchanges are scheduled as fast as possible some zero period exchanges may produce significantly more samples than others For more consistent EGD production configure the produced EGD exchanges with non zero production periods Changing IP Address While SRTP Open SRTP Server connections established with a remote SRTP client are Conne
8. respond to SNP or SNPX requests Respond to SNP SNPX Requests that include the break character if m anAttach message is received that is missing the last character before the Block Check Code BCC m amessage is received that has an invalid BCC or is corrupted so the calculated BCC doesn t match the BCC specified in the message Power to the CPU must be cycled to regain communications Call to Service Request 24 May As expected a Loss of or missing option module fault is always recorded in Need to be Repeated the PLC fault table when using SVC REQ 24 to reset an IO module However the CPU374 does not always record the corresponding Reset of addition of or extra option module Instead this fault occurs every other execution of SVC 24 rather than every execution Serial Communication at 1200 Baud A break free SNP serial connection at 1200 baud may fail occasionally If failures are observed users should choose a higher baud rate Programmer communications are not affected by this problem MOVE_REAL Function Block May A PLC CPU Software Fault may occur if the MOVE_REAL function block is Cause PLC CPU Software Fault used with certain IN and Q parameters SVC 7 Change Read TOD Clock Service Request 7 Change Read Time of Day Clock does not automatically Does Not Auto set Day of Week calculate the day of week when the clock is set This operation differs from the 35x and 36x CPUs Specifically if a change set operation with SVC 7
9. to the pre defined table of R1 R60 an error message may be displayed stating An error was detected when trying to retrieve setting from PC cookie Important Product Information 5 GFK 2123Q not currently displayed in the area provided the columns is incorrect The first column is much wider than the others Spurious Ethernet Fault In rare instances after power cycle the Ethernet Interface may log the following fault Event 28H Entry 2 OOOeH This fault can be safely ignored Unexpected EGD CommReg Status EGD Commands may return COMMREQ Status 9590H internal error instead of the expected B190H Can t locate remote node when unable to locate a remote device on the network Too many EGD Commands The Ethernet Interface supports 10 simultaneous EGD commands When Reported as Internal Error an 11 EGD Command COMMREGQ is issued the CSW value 9590H internal error is returned EGD Command Passwords Are Not Optional passwords are not allowed within EGD Command COMMREQs Supported Very Heavy EGD Very heavy EGD production and or consumption at a server device may Production Consumption at Server cause EGD command timeout errors when another device attempts to May Cause EGD Command send EGD commands to that server Timeouts SRTP Server Errors Can Cause The SRTP Server in the Ethernet Interface can encounter various errors Timeouts at Channels Client when the remote Series 90 PLC client takes down an SRTP connection
10. C into the local PLC memory The logic application must not use any data returned to the local PLC if the EGD command status indicates failure To avoid writing partial data to the local or remote PLC be sure that bit memory data transfers do not exceed the configured reference memory sizes at the appropriate PLC Usage of New IP Subnet Mask Because the Ethernet interface operates using a retained set of IP address Configuration subnet mask information a change to these values does not take effect until a restart of the module or power cycle of the rack containing the module The user should be aware when altering these configuration values that their effect is not immediate Cannot Change EGD Class 2 UDP Processing an Advanced User Parameter File containing parameter Port Number gctl_port does not actually change the value 6 Important Product Information GFK 2123Q COMMREQ Length Error The COMMREQ Status Word value 8190H COMMREQ is too short may also be reported for EGD Command COMMREQs that are too long contain more words than expected Producer ID of Zero in Capabilities Producer ID is set to zero in the EGD Capabilities response if the IP Response address is set up by the setIP utility Afterwards any subsequent Hardware Configuration store will have the producer ID reported correctly EGD I O has unexpected variability EGD I O has intermittent unexpected variability under heavy load For a under heavy loa
11. Ethernet Operational Notes Subject Ethernet Interface Functionality For Release 12 0 of the CPU374 the Ethernet Interface functionality has been Changed changed to more closely align with the PACSystems Ethernet Interface functionality Functionality affected includes station manager commands Functionality affecting application and protocol behavior has not been changed For details see TCP IP Ethernet for Series 90 30 CPU374 User s Manual GFK 2382 Configuration of IP Address is The Ethernet Interface within the CPU module cannot operate on a network Required Before Using Ethernet until a valid IP address is configured The necessary Ethernet addressing Communications information must be configured prior to actual network operation or to recover from inadvertent changes to the Ethernet addressing data at the Ethernet Interface Use one of the following methods to initially assign an IP address m Connect a serial terminal to the Station Manager port of the PLC Then use the CHSOSW command to enter the desired IP address For details see the TCP IP Ethernet for Series 90 30 CPU374 Station Manager Manual GFK 2383 Temporarily assign an IP address to the module using the SetIP tool over the Ethernet network For details see TCP IP Ethernet for Series 90 30 CPU374 User s Manual GFK 2382 Once a temporary IP address has been set up the Ethernet Interface can be accessed over the network such as by the Machine Edition programmi
12. GFK 2123Q April 27 2006 IMPORTANT PRODUCT INFORMATION READ THIS INFORMATION FIRST Product Series 90 30 CPU374 PLUS IC693CPU374 GP IC693CPU374CA GP CPU Firmware Version 12 04 Ethernet Firmware Version 3 32 Release 12 04 of the CPU374 PLUS firmware resolves power on issues described on page 3 There are no new features in this release Release 12 04 modifies the CPU board Ethernet daughterboard and boot and application firmware on each Previous versions of the CPU3 74 PLUS cannot be field upgraded to release 12 04 Release 12 04 is not compatible with IC693CPU374 Dx and older hardware Upgrades No field upgrade kit is available for release 12 04 Customers who experience the issues described in CPU Problems Resolved by Firmware Version 12 04 and Ethernet Problems Resolved by Firmware Version 3 32 on page 3 should contact GE Fanuc Technical Support Hardware versions CPU3 4 Dx and earlier cannot be upgraded to this hardware or firmware release Users of CPU374 hardware that is not compatible with CPU374 GP who require new features introduced in CPU374 EK or later versions can upgrade their hardware via the Trade Up program Contact your local GE Fanuc representative or distributor for details on the Trade Up Program Product Documentation Series 90 30 PLC Installation and Hardware Manual GFK 0356 Series 90 30 20 Micro PLC CPU Instruction Set Reference Manual GFK 0467 TCP IP Ethernet for Series 90 30 CP
13. IC693ALG220 221 Analog Input Modules Version G or later of the IC693ALG220 221 must be used with these CPUs If a version F or earlier IC693ALG220 221 module is used with a 35x 36x 37x CPU the Al values reported by the module may exhibit erratic behavior IC693PBM200 PROFIBUS Master All C693PBM200 modules used with a CPU374 must be updated to firmware Module Version Requirements version 1 16 or later When earlier C693PBM200 versions are used with CPU374 backplane communications errors and PLC faults occur frequently while the CPU is in RUN mode IC693PBS201 PROFIBUS Slave All C693PBS201 modules used with a CPU374 must be updated to firmware Module Version Requirements version 1 28 1 or later Earlier C693PBS201 versions have issues similar to IC693PBM200 versions earlier than 1 16 Ethernet Functional Compatibility Programmer Version Requirements Proficy Machine Edition Logic Developer PLC 5 0 Service Pack 3 Hot Fix 3 or later must be used to configure Web Server support or to enable EGD Signatures CIMPLICITY Plant Edition Version CIMPLICITY Plant Edition 6 1 Service Pack 1a with Update Requirements 040204 s90tcp 6101 or Service Pack 2 or later must be used for Ethernet communications with CPU374 Release 12 0 or greater Name Resolution Unlike the CPU364 IC693CPU364 the CPU374 does not support Name Resolution BOOTP Unlike the CPU364 the CPU374 does not support BOOTP AAUI Port Unlike the CPU364 the CPU374 does not
14. U374 User s Manual GFK 2382 TCP IP Ethernet for Series 90 30 CPU374 Station Manager Manual GFK 2383 Important Product Information this document GFK 2123Q 2 Important Product Information GFK 2123Q CPU Functional Compatibility HHP Compatibility The CPU374 does not support the Hand Held Programmer Programmer Version Requirements Proficy Machine Edition Logic Developer PLC 5 0 Service Pack 3 Hot Fix 3 or later must be used to configure Web Server support or to enable EGD Signatures Machine Edition Logic Developer version 2 60 or later VersaPro version 2 03 or later or Control software version 2 50 or later must be used to configure and program the CPU374 All Series 90 30 Ethernet Interface IC693CMM321 modules used with this Module Version Requirements CPU should be updated to IC693CMM321 firmware release 1 10 or later Power Supply Compatibility and A CPU374 requires the use of a High Capacity Power Supply Requirements IC693PWR330 IC693PWR337 or IC693PWR332 Power consumptions of the CPU374 and its supporting devices are listed below m CPU374 requires 1 48A 5VDC 7 4 Watts m lf used the converter in the IC690ACC901 serial cable assembly adds 100mA at 5VDC 0 5 Watts m If used the IC690ACC900 RS 422 RS 485 to RS 232 converter adds 170 mA at 5 VDC 0 85 Watts IC693ALG220 221 Analog Input Series 90 30 CPUs 35x 36x 37x are not compatible with versions F and earlier Module Version Requirements of the
15. am Store Device overrides are not stored This means that after the reference data is read back from flash or the EZ Program Store Device and subsequently the PLC is put into Run Mode the logic may execute differently Therefore overrides should not be used if reference data is stored to flash or to the EZ Program Store Device If overrides are used particular care should be taken to prevent loading reference data from flash at power up If this precaution is not observed unexpected operation may occur upon power cycle Writing Flash Using a Serial When writing very large programs to flash memory you may need to increase Programmer the request timeout value in the programming software to avoid receiving a request timeout message An upper bound of 25 seconds is typically satisfactory For further details see the Ethernet Operational Notes item Store of Program or Reference Tables to Flash may Cause Loss of Ethernet Communications on page 10 Storing Large Configurations A Series 90 30 PLC using a CPU374 supports a maximum of 32 DSM314 modules This number is reduced when other intelligent modules are used in the PLC such as APM and GBC modules It may also be reduced when m The number of racks in the PLC increases The total size of logic motion and AUP files increases m The application uses C logic blocks or a C logic program and w Connected programmers or HMI devices are used to read reference memory or fault tabl
16. ction Open May Generate not terminated as expected when the PLC s IP address is changed typically Log Events by storing a new HW Configuration A Series 90 SRTP client SRTP channels reports either a 9690H or 0190H status the SRTP connection may remain open until the connection is terminated as a result of a client timeout Please refer to Open Ethernet Problems Internal Problem ID Code CR 1434 for more information AUP Parameter Should Not be The Advanced User Parameter wsnd_ buf should not be changed by the Changed user Changing the value of this parameter may cause the LAN led to go out and the Ethernet Interface to drop connection Heavy Load Can Block Station As explained in TCP IP Ethernet for Series 90 30 CPU374 Station Manager Manager Manual GFK 2383 Chapter 1 a heavy EGD and or SRTP load can block Station Manager operation Web Server Browser Restrictions Internet Explorer version 4 0 running on Windows 98 will give an error when the reference table web page is accessed Web Server operation has been verified with Internet Explorer version 5 0 Very Heavy EGD Very heavy EGD production and or consumption at a server device may Production Consumption at Server cause EGD command timeout errors when another device attempts to send May Cause EGD Command EGD commands to that server If EGD commands must preempt normal Timeouts production you may set the gcmd_pri Advanced User Parameter to 2 see GFK 2224 App
17. d Produced Exchange EGD samples may occasionally be delayed by as much as a production period Ethernet Interface time drift If time synchronization is not configured for the Ethernet Interface it loses time at a rate of approximately 0 3 seconds per hour Clear of large hardware A Log event 08 20 may occur when very large hardware configurations are configurations may cause log event cleared and transfers are active on other Server connections This log 08 20 event can be safely ignored EGD Command Timeout Incorrect Currently the Ethernet Interface will wait for an EGD Command for a period of time equal to four times the configured timeout before expiring If an accurate timeout is required it should be configured to one quarter of the desired time Remote Access to W Memory with The CPU374 does not currently support accesses to W memory in EGD Commands Not Supported remote PLCs with EGD Commands CPU Operational Notes Subject Battery Backup Limitations The expected life of a standard Series 90 30 3 volt lithium battery used to back up a CPU374 is 1 2 months when used continuously If a longer battery backup period is required the external battery module IC693ACC302 is available The extended battery module provides a nominal battery backup period of 15 months for the CPU374 See GFK 2124 for additional information Overrides Not Stored to Flash When storing reference data to flash or the EZ Program Store Device or EZ Progr
18. endix A Note that by doing so EGD exchange production may be delayed Important Product Information 9 GFK 2123Q Subject SRTP Application Timeouts Must The application timeouts within SRTP Channels also include the time needed Accommodate Network Connection to establish and maintain the underlying network and SRTP connection Overhead Examples are establishing the TCP connection for a new channel establishing communication with the remote device and TCP retransmissions during Channel operations If the time needed for TCP connection establishment or maintenance exceeds the user specified channel application timeout values an application timeout will occur Channel application timeouts are temporary errors the channel continues to run AUP Parameter gcmd_pri Does The Advanced User Parameter gcmd_ pri does not have the desired effect in Not Affect the Behavior of EGD the CPU 374 Under sufficiently heavy EGD data exchange load EGD commands may still be blocked from execution Firmware Update Failure with Some revision EK and EL units may exhibit random reset of daughter Reset of Daughter Board Fault board faults in the PLC Fault Table These units may fail during a firmware update Customers who experience this issue should contact GE Fanuc Technical Support Client Channels TCP Resource There is a period of time that the OS Network stack hangs on to the TCP Management resources associated with a connection afte
19. es In some cases it may be possible to increase the number of DSM314 modules that the CPU374 will accept in the hardware configuration by storing logic first and then storing the configuration separately Important Product Information T GFK 2123Q Subject Simultaneous Load and Store When operating with multiple programmers attached initiating a store operation from one programmer during a load operation from another programmer will cause the load to fail Transition Tables are not The transition tables are not cleared upon clearing the reference tables cleared when the reference through the programmer tables are cleared Upgrading Firmware with Many The process of upgrading the PLC firmware with the WinLoader utility may fail Modules in Rack when multiple IO modules are in the main remote or expansion racks due to the extra time it takes to restart the PLC CPU If the upgrade process fails wait until the OK LED on the power supply stops blinking and then click the Retry button on the Winloader Firmware Update Failed dialog box If the upgrade fails again move the PLC CPU to a rack without IO modules and restart the upgrade process Auto baud Feature Not The serial auto baud feature intended to allow a serial connection at lower Supported baud rates than the default 19 2K is not supported on the CPU374 If the user desires a connection at a non default baud rate the proper configuration should first be stored to the PLC
20. ever storing configuration separately from logic or reference tables always succeeds 10 Important Product Information GFK 2123Q Subject Store of Program or Reference While storing the PLC program configuration and or reference tables from Tables to Flash May Cause Loss of PLC RAM memory into Flash memory or to the EZ Program Store device Ethernet Communications Ethernet data communications may be lost Normal data transfers are temporarily suspended during a Flash or EZ Program Store device store operation In these cases Ethernet data transfers such as used by an Ethernet PLC Programmer connection will fail wnen the store exceeds the 16 second maximum period allowed for completion Upon completion of the store operation normal operation will resume If a timeout occurs during a store to Flash or EZ Program Store device the timeout value should be increased in the programming software being used See the User s Manual for the programming software for more details EGD Performance Information Users requiring detailed EGD performance information should contact their Application Engineer and ask about the EGD Performance Application Note for the CPU374 Documentation Errata Series 90 30 20 Micro PLC CPU Instruction Set Reference Manual GFK 0467M chapter 12 Control Functions section PID Algorithm Selection PIDISA or PIDIND and Gains The description of the Derivation term should be replaced with the fol
21. have an AAUI Port Important Product Information 3 GFK 2123Q CPU Problems Resolved by Firmware Version 12 04 CPU374 Ex and Fx CPUs Occasionally some CPU374 EK EL FM and FN CPUs power on with the Occasionally Power On with EOK EOK LED off and Ethernet communications are not functional Station LED Off Manager also does not work and there is a loss of daughter board fault in the PLC Fault Table The only recovery from this condition is to turn the unit off and back on CPU374 Occasionally Powers On Occasionally the CPU374 powers on with both the OK LED on the power with OK and EOK LEDs Off supply and the EOK LED on the CPU module off Only the PWR LED on the power supply is on all other LEDs are off No communication is possible through the power supply serial port or via Ethernet No I O is scanned and Station Manager is non functional The only recovery from this condition is to turn the unit off and back on Ethernet Problems Resolved by Firmware Version 3 32 CPU374 Ex and Fx OK LED does After power on the OK LED on the power supply of some CPU374 EK not Stop Blinking after Power On EL FM and FN CPUs does not stop blinking The CPU does not scan I O and serial communication through the power supply port does not function Ethernet communications and Station Manager are also non functional CPU Restrictions and Open Issues Subject Power Supply Serial Port does not The Power Supply Serial Port does not
22. is performed on a CPU374 and only hour minute second and date are specified day of week is not specified a subsequent read back of the clock using SVC 7 does not contain a valid day of week If this same operation is performed on a 35x or 36x CPU the day of week is calculated by the CPU and filled in when the clock is read Important Product Information GFK 2123Q Ethernet Restrictions and Open Issues Subject Number of SRTP Requests Tallied When running multiple SRTP client channels the number of requests as May Vary reported by the client and the server may differ between the connections SRTP Connections Remain Open After IP Address Changed The Ethernet Interface does not terminate all open SRTP connections before changing its IP address Once the local IP address has changed any existing open TCP connections are unable to normally terminate This can leave SRTP connections open until their underlying TCP connections time out If quicker recovery of the SRTP connection is needed modify the wkal_idle Advanced User Parameter to reduce the TCP keep alive timer down to the desired maximum time for holding open the broken connection Refer to TCP IP Ethernet for Series 90 30 CPU374 User s Manual GFK 2382 for details Reporting of Duplicate IP Address The CPU374 does not log an exception or a fault in the PLC Fault Table when it detects a duplicate IP address on the network TCP Connections May Remain Half Open
23. log and or PLC Fault Table can be completely filled with repetitive error messages Under moderately heavy EGD traffic load the Ethernet Interface may occasionally lose synchronization with its SNTP time server and generate exception log event 29 entry 2 bH When large numbers of EGD exchanges are produced at a rapid rate some consumed EGD exchanges may exhibit lower rates of consumption than expected To better balance produced and consumed EGD exchange performance reduce the number or frequency of the produced exchanges configured at this Ethernet Interface Average latency of communications on SRTP channels may vary considerably due to TCP retransmissions SRTP client applications should be designed to take this variance into account The PLC Fault Table web page does not display the correct data for the PLC date and time field The date and time displayed are the PCs local date and time not the PLCs date and time On rare occasions the error Module hardware fault may be reported on the Ethernet daughterboard The corresponding fault in the exception log is Event 1 followed by text Ethernet failure This fault is a nuisance fault and may be ignored After several hours of heavy load on the web server the web server may fail to return pages and may cause a LAN system software fault to be logged The web server will resume serving pages when the load is reduced If you select a user defined table and then try to go back
24. lowing text The Derivative term is the time rate of change of the Error term in the interval since the last PID solution Derivative AError dt Error previous Error dt where dt Current PLC elapsed time PLC elapsed time at previous PID solution In normal mode that is without Reverse Action mode this is the change in the error term SP PV previous SP previous PV previous PV PV previous SP SP However when the Error Polarity bit bit 0 in the Config Word is set the sign of the change in the error term is reversed Error previous Error PV SP previous PV previous SP PV previous PV SP previous SP The change in the error term depends on changes in both the Set Point and the Process Variable If the Set Point is constant the difference between SP and the previous SP is zero and has no effect on the output However Set Point changes can cause large transient swings in the derivative term and hence the output Loop stability may be improved by eliminating the effect of Set Point changes on the derivative term Set the third bit bit 2 of the Config Word to 1 to calculate the Derivative based only on the change in PV For bit 2 set in normal mode bit 0 0 Error previous Error Error previous Error previous PV PV and with bit 2 set in Reverse Action mode bit 0 1 Error previous Error PV previous PV For details
25. ng software The programmer should then be used to configure the proper IP address for the Ethernet Interface 8 Important Product Information GFK 2123Q Subject Proper IP Addressing is Always The CPU s embedded Ethernet Interface must be configured with the correct Essential IP Address for proper operation in a TCP IP Ethernet network Use of incorrect IP addresses can disrupt network operation for the PLC and other nodes on the network Refer to TCP IP Ethernet for Series 90 30 CPU374 User s Manual GFK 2382 for important information on IP addressing When storing a new HW configuration to the PLC be sure that the HW configuration contains the proper Ethernet addressing data IP Address Subnet Mask and Gateway IP Address for the PLC Note Machine Edition programming software maintains the target IP address used to connect the programmer to the target independent of the contents of the HW Configuration for that target The target IP address is set in the Target Properties in the ME Inspector window Storing a HW Configuration whose Ethernet addressing data contains an IP Address that is different from the PLC target IP address will change the IP address used by the target PLC as soon as the Store operation is completed this will break the Programmer connection Before attempting to reconnect the Programmer you must change the target IP address in the Target Properties in the CME Inspector window to use the new IP address To
26. r it is closed It applies to the initiator of the close which is almost always the client side This time is referred to as the TCP Linger Period Once the TCP Linger Period expires 60 seconds in the current OS implementation the TCP resources are released Application developers using client channels need to be aware of this behavior when designing their logic There are a finite number of TCP resources allocated to client channels and if channel connections are brought up and down so fast that these resources are depleted then the application may have to wait until a TCP resource frees up in order to establish another client channel a COMMREQ Status of 0xA890 is returned if no TCP resources are currently available application should wait and retry again SRTP Client Channels provides features that help the user preserve TCP connections These include a period time where one can establish an SRTP Channel and specify the channel to run at a given interval or run as fast a possible One can also specify a number of iterations or run forever Additionally SRTP Channels allows re tasking of an active channel to the same remote device where the parameters of an active channel such as the channel command type Read Write number of repetitions time periods local memory address remote memory address etc can be changed SRTP Channels also allows re tasking of an active channel to a different remote device changing the remote de
27. vice s IP address etc However re tasking to a different remote device will neither conserve TCP connections nor save on the time it takes to create a channel Ethernet Programmer May Briefly Storing a PLC configuration containing Ethernet configuration values may Lose Communications When require the Ethernet interface to restart itself in order to use any changed Configuration Stored configuration values When the Ethernet interface restarts an Ethernet PLC Programmer briefly reports a loss of communications If this occurs the Ethernet Interface will post two or more PLC faults with the text LAN system software fault resuming and fault specific data starting with 080008 and or 080042 In addition faults with text Bad remote application request discarded request 1B0021 and Local request to send rejected discarded request 110005 may occur When these faults occur the STAT LED on the CPU374 is turned off to indicate posting of faults to the PLC fault tables In some cases a 10 second delay may occur before loss of communications is detected Normal operation resumes once the Ethernet Interface restarts The STAT LED can be reset using the Station Manager OK command When the PLC configuration is stored from an Ethernet PLC Programmer the communications loss occurs immediately after successful completion of the store Attempts to store configuration plus logic and or reference tables in one operation can fail How
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