ProSoft Technology MVI46-MBP - Manual (Page 88)

MVI46-MBP ♦ SLC Platform Reference
Modbus Plus Communication Module
Page 88 of 101 ProSoft Technology, Inc.
February 19, 2008
5.9.6 Is it possible to create and send commands from the ladder
logic?
Yes. You can create your own commands in the SLC memory and send these
commands using block 9002. Up to 6 commands can be sent at each scan using
block 9902.
5.9.7 Is it possible to disable and enable commands in ladder?
Yes. The user can disable or enable commands that are configured in the Master
Command List using ladder logic. Block 9010 disable commands (enable code
=0), block 9011 enable commands (enable code =1) and block 9012 enable
commands (enable code = 2). Up to 60 commands may be enabled/disabled
using these blocks.
Another way to enable commands is by using the ladder logic to send a
command execution block (block 9003). This block puts commands that are
configured in the Master Command List on a high priority basis in the command
queue even if these commands are disabled.
Refer to the user manual for information on how to use blocks 9010, 9011, 9012
and 9003.
5.9.8 After I disable (or enable) a specific command, how do I check
the status of the command?
Use the debug port to view the Master Command List to determine if the
command is currently disabled or enabled.
5.9.9 What happens if the MVI46-MBP module performs a
COLDBOOT or WARMBOOT after commands have been
disabled by the ladder?
The new ENABLE code for each command will be sent to the module.
5.9.10 Does the MVI46-MBP operate as a Master and Slave
simultaneously?
Yes. If the module starts receiving commands on the MBP port, it starts to
operate as a Slave. If the MVI46-MBP sends commands, it operates as a Master.
Therefore, no specific configuration is required to set the module as a Master or
Slave.