Rockwell Automation 1794-ID2 U.MNL INCREMENTAL ENCODER User Manual
Page 56
5–4
How Communication Takes Place and I/O Image Table Mapping with the DeviceNet Adapter
Publication 1794ĆUM015B-EN-P - May 2001
Block Transfer Read Word Assignments for the Incremental
Encoder Module (1794-ID2)
(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
⇓
Read
1
Not used
PR1
PR0
S1
S0
C1
C0
G1
Z1
B1
A1
G0
Z0
B0
A0
2
Channel 0 - Stored counter value on channel 0
3
Channel 1 - Stored counter value on channel 1
4
Channel 0 - current counter value on channel 0
5
Channel 1 - current counter value on channel 1
6
Channel 0 - Counter word 0 readback
7
Channel 1 - Counter word 1 readback
8
Revision read - software version code
Where: A0 = Status of input A, channel 0 - bit = 1 when input is on
B0 = Status of input B, channel 0 - bit = 1 when input is on
Z0 = Status of input Z, channel 0 - bit = 1 when input is on
G0 = Status of input G, channel 0 - bit = 1 when input is on
G1 = Status of input G, channel 1 - bit = 1 when input is on
A1 = Status of input A, channel 1 - bit = 1 when input is on
B1 = Status of input B, channel 1 - bit = 1 when input is on
Z1 = Status of input Z, channel 1 - bit = 1 when input is on
C0 = Cal 0 - when bit is set, counter 0 has been calibrated (reset by CalReset)
C1 = Cal 1 - when bit is set, counter 1 has been calibrated (reset by CalReset)
S0 = Stored 0 - when bit is set, counter 0 value has been saved in Store 0 (reset by StoreReset)
S1 = Stored 1 - when bit is set, counter 1 value has been saved in Store 1 (reset by StoreReset)
Once a Store occurs, L0 and L1 are on until cleared by StoreReset (counter word bit 14)
PR0 = Preset 0 reached - when bit is set, counter 0 has reached value of preset
(reset by PresetReset)
PR1 = Preset 1 reached - when bit is set, counter 1 has reached value of preset
(reset by PresetReset)
Block Transfer Write Word Assignments for the Incremental
Encoder Module (1794-ID2)
(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
1
Channel 0 Control Word - control word for setting the function of counter 0
2
Channel 1 Control Word - control word for setting the function of counter 1
3
Channel 0 Preset - value to load or compare with counter 0
4
Channel 1 Preset - value to load or compare with counter 1
5
Control Word 2 - control word for setting the filter function of boath counters
6-7
Not used