Emerson PACSystems RX3i - Communications Coprocessor Module (CMM); Programmable Coprocessor Module (PCM)

PACSystems™ RX3i and RSTi-EP CPU Reference Manual Section 5
GFK-2222AK October 2019
Communications 132
5.2.7 Communications Coprocessor Module (CMM)
PACSystems does not support the following with an IC697CMM711:
▪ Access to Symbolic variables
▪ WAIT mode COMMREQs.
▪ Connecting the programming software to the CPU through the CMM’s serial ports.
▪ Permanent datagrams.
The following restrictions apply when using the IC697CMM711 with PACSystems:
▪ Access to %W 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.
Note: For details on operation of the IC697CMM711, refer to the Series 90 PLC Serial
Communications User’s Manual, GFK-0582.
5.2.8 Programmable Coprocessor Module (PCM)
PACSystems does not support the following with an IC697PCM711:
▪ Connecting the programming software to the CPU through the serial ports on the
PCM711.
Access to Symbolibc variables.
▪ WAIT mode COMMREQs.
▪ The following C functions are not supported:
▪ chk_genius_bus
▪ chk_genius_device
▪ get_cpu_type_rev
▪ get_memtype_sizes