ProSoft Technology MVI56-LTQ - Manual (Page 84)

Reference MVI56-LTQ ♦ ControlLogix Platform
User Manual Limitorque Valve Actuator Master Communication Module
Page 84 of 98 ProSoft Technology, Inc.
August 30, 2010
Example 5:
The LTQ is successfully communicating to each slave and sets the bits equating
to Channel A to 0. A value of 0 in the Channel A status indicates successful
communication.
Example 6:
The LTQ is successfully communicating to slave 1, 3, 4, and 5. Slave 2 does not
respond causing the LTQ to set slave 2 Status register bit 10 to 1. In this
example, slave 2 is without power causing the slave 2 network board bypass
relays to de-energize. This de-energizing of the bypass relays shorts the signal
through the network board and isolates the slave from the DDC-100 network.
Example 7:
The LTQ is successfully communicating to slaves 1 and 2 but is not able to
communicate to slaves 3, 4, and 5 causing the LTQ to set slave 3, 4, 5 Status
register bit 10 to 1. This typically indicates a broken or shorted cable between
slave 2 and 3, a broken cable connection at slave 2 or 3, improperly terminated
wires at slave 2 or 3, or loss of power to slaves 3, 4, and 5.