Eaton ELC-PB, Programming Manual

Page: 713 / 728

A. C o m m u n i c a t i o n s
A - 1 5
Field Name ASCII
Slave Address 01
Command code 01
Bytes Count 05
Data (Coils T27…T20) CD
Data (Coils T35…T38) 6B
Data (Coils T43…T36) B2
Data (Coils T51…T44) 0E
Data (Coils T56…T52) 1B
Error Check (LRC) E6
END 1 0D (Hex)
END 0 0A (Hex)
Command Code
：
02, Read Input Status
Example: Read status of contact Y024~Y070 from Slave ID#01
Master → ELC “: 01 02 05 14 00 25 BF CR LF”
Sent message:
Field Name ASCII
STX 3A (Hex)
Slave Address 01
Command code 02
Starting Address Hi 05
Starting Address Lo 14
Number of Points Hi 00
Number of Points Lo 25
Error Check (LRC) BF
END 1 0D (Hex)
END 0 0A (Hex)
Assume Number of Points in sent message is
n
(Dec), quotient of
n
/8 is
M
and the remainder is
N.
When
N
= 0, Bytes Count in feedback message will be
M
; when N ≠ 0, Bytes Count will be
M+1
.
ELC → Master “: 01 01 05 CD 6B B2 0E 1B E5 CR LF”
Feedback message:
Field Name ASCII
STX 3A (Hex)
Slave Address
01
Command code
02
Bytes Count
05
Data (Coils Y033…Y024)
CD