ProSoft Technology MVI56-LTQ - Manual (Page 24)

Configuring the MVI56-LTQ Module MVI56-LTQ ♦ ControlLogix Platform
User Manual Limitorque Valve Actuator Master Communication Module
Page 24 of 98 ProSoft Technology, Inc.
August 30, 2010
2.3.5 BlkDelay
This is an empirical value used by the module to balance the amount of time the
module spends block transferring and the amount spent handling port
communications. The value entered is used as a loop counter in the module,
where each time through the loop the count is incremented. When the count
equals the Block Transfer Delay Counter a Block Transfer sequence is initiated.
Example: In Master Mode applications with the module in a remote rack, the
frequency of command execution can be improved by entering a value of 75 to
150. The value must be determined empirically.
2.3.6 LastState
This value determines the state of the Limitorque read register values that are
returned to the PLC upon the detection of a communication failure state (that is,
comm has failed on both Port A and B).
Value Description
0
Clear last data values (default)
1
Maintain last data values
2.3.7 NetPoll
Value Description
0 Loop Mode (Port 1 and 2 alternating)
1 Port 1 polling only
2 Port 2 polling only
The Network Loop Mode emulates Limitorque’s polling scheme that takes
advantage of the actuator ability to repeat data transmissions and to operate in a
looped mode. In this mode, the module will alternate communications between
Port 1 and 2. Command failures on one port will be retried on the other port.