Version : 1.20
a
12
8. Modbus
8.1 Serial interface description
QD
E-950 supports both RS485/RS232 interface.
Description
Pin
Default Serial Parameter
RS485
Modbus RTU protocol
11
: RS485
+
(orange)
12
: RS485
-
(
sky blue
)
baudrate 115200bps,
Word Length: 8bit,
Stop Bits: 1bit,
Parity: none
RS232
Duali Protocol
2:
PWR_
GND(
black
)
3: RS232_RX(
gray
)
4: RX232_TX(
pink
)
baudrate 9600bps,
Word Length: 8bit,
Stop Bits: 1bit,
Parity: none
Please refer to the complete MODBUS specifications on www.modbus.org for further details
8.2 Modbus set-up note
1.
In case user wants to connect more than 2 readers into one line, please set slave address
differently for those readers (eg. device A = 0x01, device B = 0x02)
2.
Base Address and RS485 parameters(Baudrate ) are modifiable.
8.3 Modbus Address Map & Parameters
8.3.1 Card Serial (Input Register) Address Map
offset(word)
Hi
Lo
Description
Card Serial Number
(hex)
0001
SN(1)
SN(2)
Card Serial Number
0002
SN(3)
SN(4)
W
0016
SN(31)
SN(32)
Length (hex)
0017
RFU
Length
Card Serial Number
(ASCII)
0018
SN(1)H
SN(1)L
Card Serial Number
0019
SN(2)H
SN(2)L
W
0049
SN(31)H
SN(32)L
Length (ASCII)
0050
RFU
Length
QDE-950-4 User Manual
