Rockwell Automation 1746-HSCE2 Multi-Channel High Speed Counter Module - Manual (Page 74)

Publication 1746-UM002B-EN-P - August 2004
4-24 Configuration and Programming
Transmit Bit
The transmit bit is not used. A programming cycle is not needed to
program these bits. The block is acted upon for every program scan
that bit 07 of word 0 is set. Therefore, a transmit bit is not used.
Programming Block Identification Bit
(Word 0, Bit 07)
This bit identifies the type of block.
Control Words
(Words 1 to 4)
Each counter has its own control word.
In the following programming bits, (n) equals the counter number.
ENn: Enable Counter (n) Bit
(Words 1 to 4, Bit 00)
On power-up or when the EN(n) bit is reset, the counter is in a frozen
state. The counter is free to run when the EN(n) bit is set. All of the
counters must be disabled before transmitting a Module Setup
programming block. The affected counters must be disabled before
transmitting a Counter Configuration programming block. The affected
TIP
If an invalid condition exists, the PERR and ACK
bits are set and all data in the block is considered
invalid.
Table 4.10 Control Word Assignments
Control Words Counter Number
Word 1 Counter 1
Word 2 Counter 2
Word 3 Counter 3
Word 4 Counter 4