If Upgrading Firmware
The user program, configuration, CPU ID (used for SNP communication), and status tables will automatically
be cleared when the CPU firmware EPROM is changed. So you will need to restore these after performing a
firmware upgrade. The user program, configuration, and status tables can be restored from a program folder,
from memory card, or EEPROM. The SNP ID must be set separately using the MS-DOS PLC programming
software, VersaPro software, or the Hand-Held Programmer.
All IC693 Ethernet Interface (IC693CMM321) modules used with release 6.50 or later of the IC693 PLC
should be updated to release 1.10 or later of the IC693CMM321. The MS-DOS PLC programming software
(IC693 TCP/IP/Ethernet) requires both CPU release 6.50 or later and IC693CMM321 release 1.10 or later.
During a Run Mode (alt-s) Program Store of a large program block (greater than 14 kilobytes), the EM3 may
time-out, causing communications to fail. Changing the Communication Window to Run-to-Completion mode,
or storing the program in stop mode, will allow the store to take place successfully.
The FBC version 3 or later is required for release 8.00 or later of the IC693 PLC CPU firmware.
Problems Resolved by This Firmware Release (8.40)
Time-of Day (TOD) Clock Start-up Problem on CPU331 and CPU341
In some cases, if the backup battery was disconnected after the CPU was powered down, the TOD clock
would not restart when the PLC was powered back up. This would result in a fatal fault being logged that
identified the failure of the TOD clock. Subsequent cycling of power would not cause the clock to restart. It
could be restarted, however, by removing the CPU and shorting the “super capacitor” memory backup
capacitor. This problem has been corrected in firmware release 8.40. (Note that CPUs 311, 313, and 323 do
not have a TOD clock.) Users with earlier versions of CPU331 or CPU341 who experience this problem are
advised to upgrade these CPUs to firmware release 8.40 (see the heading “Firmware Upgrade Kits”).
Problems Resolved by Prior Firmware Release 8.21
FBC Editing with Hand Held Programmer (HHP)
A soft alarm fault could occur in release 8.20 when editing an FBC configuration with a hand held
programmer. This problem has been corrected in release 8.21.
Storing Foreign Module Configuration to Slot 1
Storing a configuration with a foreign module in slot 1 (possible only on 311, 313, or 323) would result in a
fatal fault in release 8.20. This has been corrected in release 8.21.
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