Bit/word definitions for block transfer read words – Rockwell Automation 1794-ID2 U.MNL INCREMENTAL ENCODER User Manual
Page 47
4–3
Writing Configuration to and Reading Status from Your Module with a Remote I/O 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
0
CTD1 CTD0 PR1
PR0
S1
S0
C1
C0
G1
Z1
B1
A1
G0
Z0
B0
A0
1
Channel 0 - Stored counter value on channel 0
2
Channel 1 - Stored counter value on channel 1
3
Channel 0 - current counter value on channel 0
4
Channel 1 - current counter value on channel 1
5
Channel 0 - Counter word readback
6
Channel 1 - Counter word readback
7
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)
Bit/Word Definitions for Block Transfer Read Words
for the
Incremental Encoder Module
Read
Word
Bit
Definition
Bit 00
Status for input A (pulse transmitter 0) - This bit, when set, indicates a signal at A.
Bit 01
Status for input B (pulse transmitter 0) - This bit, when set, indicates a signal at B.
Word 0
Bit 02
Status for input Z (pulse transmitter 0) - This bit, when set, indicates a signal at Z.
Word 0
Bit 03
Status for input G (pulse transmitter 0) -This bit, when set, indicates a signal at G.
Bit 04
Status for input A (pulse transmitter 1) - This bit, when set, indicates a signal at A.
Bit 05
Status for input B (pulse transmitter 1) - This bit, when set, indicates a signal at B.