Rockwell Automation 1794-IP4 Series B FLEX I/O PULSE COUNTER User Manual User Manual
Page 51
5–6
How Communication Takes Place and I/O Image Table Mapping with the DeviceNet Adapter
Publication 1794ĆUM016B-EN-P - August 2002
Definition
Bit
Word
Write
Word 2
Bit 00
Clock frequency for period time measurement - Channel 0 -
0 = period time measurement with 10MHz internal clock selected
1 = period time measurement with 1MHz internal clock selected
Bits 01-03
03
02 01
Number of periods for measurement - Channel 0
0
0
0
1 period
0
0
1
2 periods
0
1
0
4 periods
0
1
1
8 periods
1
0
0
16 periods
1
0
1
32 periods
1
1
0
64 periods
1
1
1
128 periods
Bit 04
Clock frequency for period time measurement - Channel 1 - refer to bit 00.
Bits 05-07
Selection of Number of periods for measurement - Channel 1 - see bits 01-03 above
Bit 08 (10)
Clock frequency for period time measurement - Channel 2 - refer to bit 00.
Bits 09-11
(11-13)
Selection of Number of periods for measurement - Channel 2 - see bits 01-03 above
Bit 12 (14)
Clock frequency for period time measurement - Channel 1 - refer to bit 00.
Bits 13-15
(15-17)
Selection of Number of periods for measurement - Channel 1 - see bits 01-03 above
Write
Word 3
Bit 00
Start new measurement bit - Channel 0 - when set, start new measurement on positive edge
Word 3
Bit 01
Start new measurement bit - Channel 1 - when set, start new measurement on positive edge
Bit 02
Start new measurement bit - Channel 2 - when set, start new measurement on positive edge
Bit 03
Start new measurement bit - Channel 3 - when set, start new measurement on positive edge
Bit 04
Reset Counter, Channel 0 - a positive edge on this bit resets counter 01
Bit 05
Reset Counter, Channel 1 - a positive edge on this bit resets counter 11
Bit 06
Reset Counter, Channel 2 - a positive edge on this bit resets counter 21
Bit 07
Reset Counter, Channel 3 - a positive edge on this bit resets counter 31
Bit 08-15
(10-17)
Reserved
Write
Words 4
and 5
Bit 0-15
(0-17)
Reserved