ProSoft Technology MVI56-LTQ - Manual (Page 26)

Configuring the MVI56-LTQ Module MVI56-LTQ ♦ ControlLogix Platform
User Manual Limitorque Valve Actuator Master Communication Module
Page 26 of 98 ProSoft Technology, Inc.
August 30, 2010
2.3.10 SpecPolling
Enables polling of specific registers in addition to the standard polling. A value
other than zero will cause an additional poll request to be sent to the slaves that
are enabled. The results are placed in registers 8 and 9 in the slave response
data block.
Using this feature has a performance cost as the time available for the standard
polling is shared with the special polling.
Value Description
0
Disabled
1
Register 55, TP_BEFORE_MID_T_HIGH
2 Registers 6/7, Analog Input 1 and 2
3 to 65535 Any value other than 0, 1, or 2 will tell the module to poll that corresponding
register number. This been added to allow for expanded use of the
SpecPolling tag. If low byte is set to 1 or 2 then the existing logic will will
remain consistent for backwards compatibility.
2.3.11 Use_CTS
This parameter defines if the CTS line is to be monitored for the communication
process. If the parameter is set to 0, the line will not be monitored. If the
parameter is set to 1, the modem control line must be set after the RTS line is
asserted for communications to occur.
2.3.12 BlkFailCnt
This parameter defines the number of successive block transfers that must occur
before the communication channels are shutdown. If the value is set to 0,
communications will continue on the ports even if the data transfer between the
processor and module fails. If the value is set to greater-than 0, the module will
suspend communications when the number of block transfer failures set is
exceeded. The valid range for this parameter is 0 to 65535.