Allen-Bradley FLEX I/O 1794-IP4, User Manual, Page: 42 / 70

4–4 Writing Configuration to and Reading Status from Your Module with a Remote I/O Adapter
Publication 1794-6.5.16 – September 1998
Definition Bit
Read
Word
Word 8
Bit 00 Positive edge – Channel 0 – measurement ready
Bit 01 Positive edge – Channel 1 – measurement ready
Bit 02 Positive edge – Channel 2 – measurement ready
Bit 03 Positive edge – Channel 3 – measurement ready
Bit 04–15 Reserved for factory use
Word 9 Bits 00–15
(00–17)
Software revision – version code of software installed
Block Transfer Write Word Assignments for the Pulse Counter
Module
(Octal Bit)
⇒
17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
Dec. Bit
⇒
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Word
⇓
Write
0 Control Word 0 – selects the measure function
1 Control Word 1 – sets the clock frequency and period multiple
2 Control Word 2 – sets the start of a new measurement
3–4 Not used
Bit/Word Definitions for the Block Transfer Write Words for the Pulse
Counter Module
Write
Word Bit
Definition
Write
Wor 0
Control Word 0 – Control word for setting the function of counter 0.
Word 0
Bits 00 Pulse counting and period time measurement selection for Channel 0 –
0 = pulse counting and period time measurement selected
1 = period time measurement selected
Bits 01 Pulse counting and period time measurement selection for Channel 1 –
0 = pulse counting and period time measurement selected
1 = period time measurement selected
Bits 02 Pulse counting and period time measurement selection for Channel 2 –
0 = pulse counting and period time measurement selected
1 = period time measurement selected
Bits 03 Pulse counting and period time measurement selection for Channel 3 –
0 = pulse counting and period time measurement selected
1 = period time measurement selected
Bits 04–15
(04–17)
Reserved