Acrel AMC 48L-A13, Installation And Operation Instruction Manual

Page: 20 / 22

17
002cH
Ct Current transformation
ratio
Explanation:
①
“—”
indicate Reserved word or
Reserved bit.
②
voltage, current etc. data numerical
value Computing Method: Reading =
Effective value
×
10E ( Exponential-3)
002dH —
Reserved word
…
002aH: alarm and switching Input / output condition word (control word):
15 14 13 12 11 10 9 8
- AL.-b AL.Lo1 AL.Hi1 AL.Lo2 AL.Hi2 AL.Lo3 AL.Hi3
(R) unbalance alarm Indication (R)HIGH,LOWalarmIndication
7 6 5 4 3 2 1 0
DI1 DI2 DI3 DI4 - DO1 DO2
Switching Input Indication(R) 1 indicate closing, 0
opening.
switching output Indication (R/W) 1 closing, 0 opening
6.5 Communication application
Example in this section adopt below format (data as hex)
Addr Fun
Data start Data # of CRC16
reg Hi reg Lo reg Hi reg Lo Lo Hi
01H 03H 00H 00H 00H 06H C5H C8H
Address Function code
Data start
address
Data read number Cyclic redundancy check code
6.5.1Read data
Example 1: Read Three phase voltage meter data
Inquiry Data frame 01 03 00 00 00 06 c5 c8
Return Data frame 01 03 0c 08 ab 00 02 08 ac 00 02 08 ac 00 02 1b 05
Explanation:
01: Slave address 03: function code
0c: hex, decimal as 12, indicate: 12 byte data rearwards
1b 05: cyclic redundancy check code Data processing method see: 6.4 communication parameter address meter
Processing as follows: 08 ab(hex)=2219(decimal)
08ac ( hex)=2220 ( decimal)
0002 ( hex)=2 (decimal)
Calculation: 2219
×
10
2
-
3
= 221.9;