Rockwell Automation 1794-ID2 U.MNL INCREMENTAL ENCODER - 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.