IPI, Programmable Controller CPU Module, GFK
Contents
1. 7 Important Product Information GFK 0838C If multiple faults exist in an IC697 PLC remote drop and one of them is corrected a FAULT contact that uses the remote drop s module reference will incorrectly indicate that no fault exists at the remote drop When power is cycled on an expansion rack in a system that is running a large sweep time when 1C641 programming software is not connected C66 Bus Controllers in that rack may not be properly configured This can be corrected by cycling power on the main and expansion racks User application faults logged for Service Request 21 can only use error codes between 0 and 2047 Use of any other error codes could cause the PLC to treat the alarms as Remote Scanner alarms2. ISABLE units and by performing automatic role switches when necessary Restrictions and Open Problems 1 If an expansion rack powers up while the CPU in the main rack is in the RUN mode the slot fault contacts will prematurely indicate that the modules in the expansion rack are not faulted before they complete their power up 2 Ina multi rack system false LOSS OF RACK faults may occur when the system loses power If this fault is configured to be fatal the system will power up in STOP mode 3 Since there are no tasks that run in the PLC s background window changes made to the Background Window Timer with IC641 programming software will have no effect 4 When there is no logic stored in a CPU module the Q and M tables will be cleared when the CPU is placed in RUN mode In this context no logic stored means that no program had ever been stored or that the clear function in IC641 programming software had been used to clear logic and configuration 5 If the CPU s toggle switch is moved to STOP and back to RUN while a C block is sending text out the serial port the serial port will stop working The CPU will have to be power cycled to make SNP and C block messages work again 6 When the Bit Sequencer sequences from one step to another the negative transitional contact that corresponds to the original step is not set The transition contact for the new step is set and remains set until the sequencer sequences to the next step
3. July 7 1994 GFK 0838C IMPORTANT PRODUCT INFORMATION READ THIS INFORMATION FIRST Product Programmable Controller CPU Module IC697CPU780D This is the production release of the IC697 PLC Model 780 CPU module version 4 60 The purpose of this release is to provide the new Redundancy enhancements described under New Features and Functionality Table 1 Catalog Number 1C697CPU780D IC697CPU780Cor earlier Identification Hardware and software identification is summarized in the following tables Table 2 Hardware Identification Board Catalog Number Identification Board Revision IC697CPU780D CPHA2 44A731786G01 RO7 or later Table 3 Software Identification neCataleg Number Number PEER OM Pecation Location EPROM Label 1 397 027C4 60 IC697CPU780D 397 028C 4 60 397 030C 4 60 397 029C 4 60 Update Information Update kits are available for a charge to update the CPU 780 to version 4 60 Table 4 Upgrade Kit Upgrade Kit For Upgrading 44 4731247 G02 1C697CPU780Cto IC697CPU780D Important Product Information GFK 0838C Documentation The following table lists applicable documentation for the IC697CPU780D CPU Table 5 User Documentation Catalog Number Data Sheet IC697CPU780D GFK 0837 GFK 0827 Read this document before installing or attempting to use the Model 780 PLC CPU Module For more information refer to the applicable Programmable Controller Installation Manual Programming Software U
4. for rack 0 the main rack If the rack jumper is not changed the PLC will not recognize the rack at all and may not properly identify the error Expansion Rack Cable 9 Do not connect or disconnect the expansion rack cable while the CPU is running This will cause the PLC to go to the STOP HALT mode Expansion Rack Power 10 Expansion racks should be powered up at the same time that the main rack is powered up or they should be powered up after the main rack has completed its power up initialization Do not power up an expansion rack while the CPU is running power up diagnostics Memor y Usage 11 A general rule of thumb for memory usage is 48 bytes per I O point plus register memory in bytes Important Product Information GFK 0838C Timer Operation 12 Care should be taken when timers ONDTR TMR and OFDTR are used in sub blocks that are NOT called every sweep The timers accumulate time across calls to the sub block unless they are reset This means that they function like timers operating in a program with a much slower sweep than the timers in the main program block For program blocks that are inactive for large periods of time the timers should be programmed in such a manner as to account for this catch up feature Similar to this are timers that are skipped because of the use of the JUMP instruction Timers that are skipped will NOT catch up and will therefore not accumulate time accurately 1 0 Link Interface 13 Whe
5. n operate as a non synchronized CPU with a Redundant Communications Module configured with IC641 software IC641 programming software cannot be used to change the PLC mode STOP RUN etc while the programming window is closed To change the PLC mode use the toggle switch on the CPU module Important Product Information GFK 0838C Problems Resolved by this Upgrade Not applicable New Features and Functionality Increased Transfer Size 1 The transfer buffer size has been increased from 16K bytes to 48K bytes where 20K bytes of data may be transferred during the input transfer and up to 28K bytes of data may be transferred during the output transfer This feature requires version 5 0 or later of IC641 Programming Software Transfer from Backup 2 The transfer of 8 bytes 4 registers of data from the Backup Unit to the Active Unit through use of new SVC_REQ service requests SVC_REQ 27 and SVC_REQ 28 is now supported Faster Failure Detection 3 GBC NB s now detect failure of the PLC CPU sooner This will allow the standby to take full control more quickly The new detection time is based on the configured CPU watchdog timeout value Use of this new functionality requires GBC NEK hardware with GBC NEC IC697BEM731 734K RUN DISABLE 4 The system now enforces that the Active Unit s outputs will be driven if either of the units is in RUN ENABLE This is implemented by rejecting role switches from RUN ENABLE units to RUN D
6. n powering up the PLC CPU without a battery and I O Link Interface boards are present an incorrect Loss of Module fault will be logged for each I O Link Interface board but the PLC CPU will not consider these boards as lost and the boards will continue to operate properly Constant Sweep 14 Constant Sweep time when used should be set to about 10 ms greater than the normal sweep time to avoid any oversweep conditions when monitoring or performing on line changes with the programmer The smallest valid constant sweep time setting is 10 milliseconds for the Model 780 Window completion faults will occur if the constant sweep setting is not high enough Interaction of 1C641 Programming Software with Closed Programming Window 15 The IC641 programming software Sweep Control and Monitor screen cannot be used to change the PLC s Sweep Modes or timers Constant Sweep Time Program Window Times etc while the program window is closed Use Service Requests 1 through 4 to perform these functions Loss of Option Module 16 With Hot Standby CPU Redundancy it is recommended to leave the fault action of loss of option modules at DIAGNOSTIC If changed to FATAL it is possible that a faulted Redundant Communication Module would cause both systems to go to STOP FAULTED mode at power up Simplex Mode 17 Simplex mode the mode in CPU Redundancy where the PLC CPU 780 can operate in a single PLC CPU system is not supported The PLC CPU 780 ca
7. nce tables Foreign VME Modules 5 IC641 programming software allows foreign VME modules to be configured for four modes BUS INTERFACE INTERRUPT ONLY FULL MAIL and REDUCED MAIL However the PLC CPU 780 Release 4 56 supports only the BUS INTERFACE MODULE mode The other three modes should not be configured Serial Communications 6 The following operational restrictions exist for the Serial Communications feature 1 Serial communications may add up to 5 ms of time to any given sweep This should be taken into ac count when setting the watchdog timer 2 The following procedure is recommended when changing baud rates in the PLC and the WSI board First enter the configuration package and change the baud rate on the PLC then store the new config uration Now power off the PLC and then go to the WSI setup screen and change the WSI baud rate Finally power the PLC back on 3 The link idle time setting in IC641 programming software Config for Serial Communications should not be set to less than 10 seconds otherwise a communications failure will occur when storing the config to the PLC 1C641 WSI Attach 7 Donot connect or disconnect the WSI BTM cable while the programmer host is powered on This action may cause a running PLC to switch roles from active to standby if running synchronized or go to STOP if running non synchronized Expansion Rack ID 8 The expansion racks for the IC641 PLC are shipped with the rack ID strapped
8. ser s Manual Programmable Controller Reference Manual and the Hot Standby CPU Redundancy User s Guide Special Operation Notes This release of the PLC CPU Redundancy Feature requires one of the following IC697 32 Bit Expansion Memory modules IC697MEM731D or later IC697MEM732C or later IC697MEM733D or later IC697MEM735D or later 1C641 Compatibility 1 This release of the PLC CPU modules is compatible with the version of IC641 programming software listed in the table below CPU Model 1C641 Programming Software PCM and BTM Compatibility 2 With the introduction of timing improvements and new features with the PLC CPU model 780 it is highly recommended that systems using PCMs use IC697PCM711J or later and systems using BTMs use IC697BEM713B or later Earlier revisions of these modules are susceptible to producing bus errors on the backplane Notice to Upgrade GBC NBC Hardware 3 With the introduction of the PLC CPU 780 timings with the IC66 Bus Controllers GBCs NEs have changed this has uncovered a problem in the GBC NE firmware GBCs NB s in expanded racks could be lost if the system is fully configured and only the main rack cycles power It is recommended to update existing GBC NBC hardware with Bus Controller IC697BEM731K or later Important Product Information GFK 0838C Reference Tables 4 Reference tables will not be changed during any STORE operation unless you specifically select storing of refere
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