Rockwell Automation 1794-IP4 Series B FLEX I/O PULSE COUNTER User Manual User Manual
Page 49
5–4
How Communication Takes Place and I/O Image Table Mapping with the DeviceNet Adapter
Publication 1794ĆUM016B-EN-P - August 2002
Block Transfer Read Word Assignments for the Pulse Counter
Module (1794-IP4)
(OctalBit
⇒
)
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
⇓
Read
1
Counter 00 - 16-bit periodmeasurement or low wordof 32Ćbit periodmeasurement for channel 0
2
Counter 01 - pulse counter or high wordof 32Ćbit periodmeasurement for channel 0
3
Counter 10 - 16-bit periodmeasurement or low wordof 32Ćbit periodmeasurement for channel 1
4
Counter 11 - pulse counter or high wordof 32Ćbit periodmeasurement for channel 1
5
Counter 20 - 16-bit periodmeasurement or low wordof 32Ćbit periodmeasurement for channel 2
6
Counter 21 - pulse counter or high wordof 32Ćbit periodmeasurement for channel 2
7
Counter 30 - 16-bit periodmeasurement or low wordof 32Ćbit periodmeasurement for channel 3
8
Counter 31 - pulse counter or high wordof 32Ćbit periodmeasurement for channel 3
9
Readback of Control Word 2
9
Reserved
RD3 RD2 RD1
RD0
M3
M2
M1
M0
10
Revision read- software version code
Where: M = positive edge measurement ready for the respective channel.
RD = Reset Done for respective channel.
Block Transfer Write Word Assignments for the Pulse Counter
Module
(OctalBit)
⇒
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
1
Control Word0 - selects the measure function
2
Control Word1 - sets the clock frequency andperiodmultiple
3
Control Word2 - sets the start of a new measurement
4-5
Reserved
Bit/Word Definitions
for the Pulse Counter Module
Word
Bit
Definition
Read
Word1
Bits 00-15
(00-17)
Store Counter 00 - 16-bit periodmeasurement or low wordof 32Ćbit periodmeasurement for channel 0.
Read
Word2
Bits 00-15
(00-17)
Counter 01 - pulse counter or high wordof 32Ćbit periodmeasurement for channel 0
Read
Word3
Bits 00-15
(00-17)
Counter 10 - 16-bit periodmeasurement or low wordof 32Ćbit periodmeasurement for channel 1.
Read
Word4
Bits 00-15
(00-17)
Counter 11 - pulse counter or high wordof 32Ćbit periodmeasurement for channel 1
Read
Word5
Bits 00-15
(00-17)
Counter 20 - 16-bit periodmeasurement or low wordof 32Ćbit periodmeasurement for channel 2.