
The MSTR Instruction
26
840 USE 115 00 Version 1.0
Up to four MSTR instructions can be simultaneousl
active in a ladder lo
ic
pro
ram. More than four MSTRs ma
be pro
rammed to be enabled b
the lo
ic
flow as one active MSTR block releases the resources it has been usin
and
becomes deactivated, the next MSTR operation encountered in lo
ic can be
activated.
3.2.1 Characteristics
Size
Three nodes hi
h
PLC
Compatibility
Standard in PLCs that have built-in Modbus Plus capabilities
Modbus Plus
functionalit
onl
Standard in all Quantum PLCs with Modbus Plus functionalit
and/or TCP/IP
Ethernet option modules
Available as a loadable in chassis mount PLCs
Modbus Plus functionalit
onl
Opcode
BF hex
MSTR Operation Code TCP/IP Ethernet Support
Write
lobal database 5 not supported
Read
lobal database 6 not supported
Get remote statistics 7 supported
Clear remote statistics 8 supported
Peer Cop health 9 supported
Reset Option Module 10 supported
Read CTE(confi
extension) 11 supported
Write CTE (confi
extension) 12 supported
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