MODBUS Interface
Verbatim Owner's Manual F-27
PLC Programming Code Table (Page 3 of 4)
Code Description Default Range Section
Serial Communications Parameters . . .
Continued from p. F-26
Note: See Code 4910 for default value for "net" in all of the following
4904 net *N Read/Set parity for net protocol dependent odd, even, none F.13.1
4905 net *N Read/Set local node 1 1-256 F.13.2
address for net to N
4906 net Read protocol type for net N Factory Configured Not user settable F.13.2
4907 net *N Read/Set COMALARM 30 sec. N=0.1-999.9 sec. F.13.3
Trip Delay
4908 net * V Read/Set link-level timer. Protocol Specific V is in msec. F.13.3
4909 net * V Read/Set applications-level Protocol Specific V is in msec. F.13.3
Timer
49 50 Reads/Sets all protocol varies See applicable notes F.13.4,
Miscellaneous
49 * Repeat the previous command F.14
which began with a ‘4’
4910 N Read/Set default 1 1 to 5 F.14
net to N
4911 N Read/Set default node 1 protocol dependent F.14
to N
Clearout Operations
493 *net Globally disables/enables Acts as toggle F.15
network communications
4935 4 Clears all RC user recorded F.15
speed messages
4935 5 Clears all RC net F.15
addresses and criteria
4935 8 Clears out all communications F.15
failure codes and counts
Diagnostic Readouts
Note: See Code 4910 for default value for "net" in all of the following
49 2 net Reads current Network Failure F.16
threshold for net
49 2 net *N Set Network Failure threshold 0 - 200 F.16
to N
49 30 *net Perform diagnostic self-test F.16
on specified net
49 40 Reads all 4940 X diagnostic F.16
for all networks
49 40 *net Reads all diagnostic information F.16
for net