ProSoft Technology MVI94-MCM-MHI - Manual (Page 67)

MVI94-MCM ♦ Flex I/O Platform Reference
Serial Communications Modbus Communication Module User Manual
ProSoft Technology, Inc. Page 67 of 109
March 29, 2011
5.1.4 Functional Specifications
Modbus Master
A port configured as a virtual Modbus Master actively issues Modbus commands to other nodes on
the Modbus network. The Master ports have an optimized polling characteristic that polls slaves
with communication problems less frequently.
Command List
Up to 100 commands per Master port, each fully
configurable for function, slave address, register to/from
addressing and word/bit count.
Polling of Command
List
Configurable polling of command list, including continuous
and on change of data, and dynamically user or automatic
enabled.
Status Data Error codes available on an individual command basis. In
addition, a slave status list is maintained per active
Modbus Master port.
Modbus Slave
A port configured as a Modbus slave permits a remote Master to interact with all data contained in
the module. This data can be derived from other Modbus slave devices on the network, through a
Master port, or from the module.
Node Address
1 to 247 (software selectable)
Status Data Error codes, counters and port status available per
configured slave port