35
The installation procedure is the same as for OP-03. Refer to “13.2.1. Installing OP-03”.
Set the function settings “bp5”, “btpr”, “prt”, “5if”, “adr” and “aCk” as
necessary.
Before using OP-04, the function setting “5if” must be set to specify whether RS-
422 or RS-485 is used.
To connect more than one scale to a computer, set a different address to each
scale using the function setting “adr”.
13.3.2. OP-04 Specifications
RS-422/485 Specifications
Transmission system EIA RS-422 / 485
Transmission form Asynchronous, bi-directional, half-duplex
Data format Baud rate: 2400, 4800, 9600 bps
Data bits: 7 bits + parity 1bit (EVEN / ODD)
or 8 bits (non parity)
Start bit: 1 bit
Stop bit: 1 bit
Code: ASCII
Terminator: CRLF (CR:0Dh, LF:0Ah)
LSB
0
1
2
3
4
5
MSB
6
Circuit diagram
Sto
p
bit
A-B
1 (-2V~-5V)
0 (2V~15V)
Start bit Data bi
t
sParity bit
1 SDA (RS-422 Out)
2 SDB (RS-422 Out)
3 RDA (RS-422 In / RS-485 In-Out)
4 RDB (RS-422 In / RS-485 In-Out)
5 TRM (Termination)
6 SG (Signal ground)
7 SHLD (Shield)
100Ω
1 SDA (RS-422 Out)
2 SDB (RS-422 Out)
3 RDA (RS-422 In / RS-485 In-Out)
4 RDB (RS-422 In / RS-485 In-Out)
5 TRM (Termination)
6 SG (Signal ground)
7 SHLD (Shield)