Rockwell Automation 1794-APBDPV1 FLEX I/O PROFIBUS Adapter User Manual User Manual
Page 76
Publication 1794-UM064B-EN-P - May 2014
64 Communicate With Your Module
Word
⇓
Write
1
Control Word 0 – selects the measure function.
2
Control Word 1 – sets the clock frequency and period multiple.
3
Control Word 2 – sets the start of a new measurement.
4…5
Reserved.
Where:
M = Positive edge measurement ready for the respective channel.
RD = Reset Done for respective channel.
1794-IP4 Pulse Counter Module Word/Bit Definitions
Word
Bit
Definition
Read Word 0
Bit 00…15
(00…17)
Store Counter 00 – 16-bit period measurement or low word of 32-bit period measurement for channel 0.
Read Word 1
Bit 00…15
(00…17)
Ch 0 Data 0 – pulse counter or high word of 32-bit period measurement for channel 0.
Read Word 2
Bit 00…15
(00…17)
Ch 0 Data 1 – 16-bit period measurement or low word of 32-bit period measurement for channel 1.
Read Word 3
Bit 00…15
(00…17)
Ch 1 Data 1 – pulse counter or high word of 32-bit period measurement for channel 1.
Read Word 4
Bit 00…15
(00…17)
Ch 2 Data 0 – 16-bit period measurement or low word of 32-bit period measurement for channel 2.
Read Word 5
Bit 00…15
(00…17)
Ch 2 Data 1 – pulse counter or high word of 32-bit period measurement for channel 2.
Read Word 6
Bit 00…15
(00…17)
Ch 3 Data 0 – 16-bit period measurement or low word of 32-bit period measurement for channel 3.
Read Word 7
Bit 00…15
(00…17)
Ch 3 Data 1 – pulse counter or high word of 32-bit period measurement for channel 3.
Read Word 8
Bit
Status
Bit 00
Ch 0 Ready – measurement ready.
Bit 01
Ch 1 Ready – measurement ready.
Bit 02
Ch 2 Ready – measurement ready.
Bit 03
Ch 3 Ready – measurement ready.
Bit 04
Reset Done, Ch 0 – positive edge on this bit indicates counter 01 reset done.
Bit 05
Reset Done, Ch 1 – positive edge on this bit indicates counter 11 reset done.
Bit 06
Reset Done, Ch 2 – positive edge on this bit indicates counter 21 reset done.
Bit 07
Reset Done, Ch 3 – positive edge on this bit indicates counter 31 reset done.
Bit 08…15
Reserved for factory use.
Read Word 9
Bits 00…15
(00…17)
Software revision – Version code of software installed.
1794-IP4 Pulse Counter Module Block Transfer Word Assignments
(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
03
08
07
06
05
04
03
02
01
00