Communication Coprocessor Module
restrictions
PACSystems RX7i CPUs with firmware versions 1.50 or later support
IC697CMM711 modules with firmware versions 4.20 or later. You
must ensure that you are using the correct firmware version of the
CMM because the CPU cannot check the CMM’s firmware version.
(The module’s firmware version can be found on a label attached to
the module’s EEPROM.)
PACSystems does not support the following for an IC697CMM711:
Connecting to Machine Edition to the CPU through the CMM’s
serial ports.
Access to Symbolic variables memory.
WAIT mode COMMREQs.
Permanent datagrams.
The following restrictions apply when using the IC697CMM711 with
PACSystems:
Access to %W memory references is partially supported. Only
offsets 0—-65535 of %W can be accessed via the CMM.
The Program Name is currently always LDPROG1 for
PACSystems.
Reads and writes beyond currently configured reference table
limits will report a minor code error of 90
(REF_OUT_OF_RANGE) instead of F4 (INVALID_PARAMETER)
as reported on the Series 90-70.
In case of ERROR NACK, the Control Program number, privilege
level and other piggyback status data will be set to 0.
PACSystems CPUs return the major/minor type of the 90-70
CPX935 (major type 12, minor type 35) to the CMM scratch pad
memory when communicating with a CMM.
Control Program Number will be returned as 01 in PACSystems
instead of FF as reported on the Series 90-70.
If your RX7i application program needs to access the dual port
memory of a CMM, use the BUS READ and WRITE functions.
When accessing the CMM, set the Region parameter on the
function block to 1. (For the CMM, region 1 is predefined to be the
module's entire dual port memory.)
Note: For details on operation of the IC697CMM711, refer to the
Serial Communications User’s Manual, GFK-0582.
