Com1 / 2 Port (Rs-485 / Rs-422) Communication - Panasonic ELC500 User Manual

11.5.3

COM1 / 2 port (RS-485 / RS-422) Communication

Item
Interface
Port number
Transmission type
Communication method
Synchronous method
RS-485
Transmission
distance
RS-422
Transmission speed
Stop bit
Parity
Transmission
Start code
format
End code
Data length
Protocol : Connected number
*4 *5
*1 Please check with the actual devices when some commercial devices with RS-485/RS-422 interface
are connected. The number of connected devices, transmission distance, and transmission speed
may be different according to using transmission line.
*2 RS-485/RS-422 can be changed with serial mode switch.
*3 Transmission distance is limited as below according to transmission speed and number of connected
unit. With under 38400bps, max. distance is 1200m and max. number is 99 units.
99
70
40
0
Transmission distance
*4 When using SI-35, SI-35USB or Eco-POWEREMTER, PLC from our company (which can be
connected up to 99 units), up to 99 unit s can be connected.
*5 For RS-422 1:1
*6 8 bit fixed for MODBUS RTU
*7 Each terminal of RS-485/RS-422 port is insulated to internal circuit.
*8 Programming tool (Control FOWIN Pro7) is necessary.
*9 Only COM1 port is supported for PLC link.
Specification
2-wire system RS-485/ 4-wire system RS-422 *2
2CH
1:N
Half-duplex
Asynchronous communication method
Max. 1,200m
Max. 400m
300 / 600 / 1,200 / 2,400 / 4,800 / 9,600 /
19,200 / 38,400 / 57,600 / 115,200 / 230,400 [bps]
1bit / 2bit
Odd / Even / None
With STX / No STX
CR / CR+LF / None / ETX
7bit / 8bit *6
MEWTOCOL (master / slave): max. 99
MODBUS RTU (master / slave): max. 99
General-purpose: max.99
PLC link: max. 16
Transmission speed: 115.2kbp
（m）
700 1000 1200
*3
*8
*8, *9
196
ELC500 Control unit
Initial setting
RS-485
－
－
－
－
－
－
19,200
1bit
Odd
No STX
CR
8bit
MEWTOCOL