User guide

Publication 1746-UM006B-EN-P - August 2005
2-4 Module Operation
The count direction can be controlled from your user program rather
than using a control signal connected to input B. This can be
accomplished with the Up/Down Count Direction bit (M0:e.1/3) as
follows:
Up/Down Count Direction – bit 3
Setup and Control
Word, Bit 3
Affect on Accumulated Count
1 Accumulated Count decrements with each count received on Input A
0 Accumulated Count increments with each count received on Input A
IMPORTANT
When internally controlling the direction with the
Up/Down Count Direction bit, input B has no affect.
When externally controlling the direction with Input
B, the Up/Down Count Direction bit (M0:e.1/3) has
no affect.
Setup and Control Word, Word 1
Bit Number (decimal)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Up/Down Count Direction bit
M0:e.1