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5–2
Single Transfer Programming
Bits 14 17, Word Select Bits.
Must have this pattern for control
word.
(Counter Mode Only )
Bit 13, Up/Down
1 = Count Up
0 = Count Down
Bit 12, Enable Outputs
1 = Enable
0 = Disable
Publication 1771 UM006B-EN-P - June 2002
Figure 5.1
Control Word Single Transfer
Function Control Bits
BIT
BIT
11
10
0
0
Count
Reset, and hold the accumulated
0
1
count at 000.
Return the accumulated count to
1
0
000 and begin counting
immediately.
1
1
Invalid, module executes previously
programmed function.
Bits 10 11, Function
Control (see table)
17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
1
0
0
0
Bit 07, Home
Latch Enable
1 = Enable
0 = Disable
Bits 14-17 of this word are word select bits. These bits must have
the setting shown in Figure 5.1 to identify the word as the output
control word.
Bit 13 of this word is the up/down bit. This bit is significant only
when the module is used in the counter mode. The state of this bit
controls module function as follows:
1 -The module increments its accumulated count with each count
received on channel A.
0 -The module decrements its accumulated count with each received
on channel A.
FUNCTION
AC > PR #1
Bit 06,
AC = PR #1
Not Used
AC < PR #1
AC < PR #2
AC = PR #2
AC > PR #2
Bits 00 02,
Comparison
Parameters for
Preset #1
1 = True
0 = False
Bits 03 05,
Comparison
Parameters for
Preset #2
1 = True
0 = False
15952
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