ProSoft Technology 5202-DFNT-MCM4 User Manual
Page 28
MCM ♦ ProLinx Gateway
MCM Protocol Configuration
Modbus Master/Slave
Driver Manual
Page 28 of 80
ProSoft Technology, Inc.
October 16, 2009
3.2.1 Enable
0,1,
2 or 3
This field defines whether the command is to be executed and under what
conditions.
If the parameter is set to 0, the command is disabled and will not be executed in
the normal polling sequence. However, the command can still be activated using
Command Control.
Setting the parameter to a value of 1 causes the command to be executed each
scan of the Command List if the Poll Interval is set to zero (0). If the Poll Interval
is set to a non-zero value, the command will be executed, when the interval timer
for that command expires.
An Enable code of 2 is valid only for write commands, FC 5, 6, 15, and 16. If the
parameter is set to 2, the command will execute only if the internal data
associated with the command changes.
An Enable code of 3 is valid only for bit-level write commands, FC 5 and 15. If
the parameter is set to 3, the command will execute only if the internal bit data
associated with the command changes. It will also clear the bit or bits in the
internal database after the write command is built.
Important: Not all revisions of the MCM driver support an Enable code of 3. To determine if your
gateway supports this Enable code, contact ProSoft Technical Support.
3.2.2 Internal
Address
0
TO
3999 (for register-level addressing)
or
0
TO
63999 (for bit-level addressing)
This field specifies the database address in the gateway's internal database to
use as the destination for data brought in by a read command or as the source
for data to be sent out by a write command. The database address is interpreted
as a bit address or a 16-bit register (word) address, depending on the Modbus
Function Code used in the command.
For Modbus functions 1, 2, 5, and 15, this parameter is interpreted as a bit-
level address.
For Modbus functions 3, 4, 6, and 16, this parameter is interpreted as a
register-level address.