User guide

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