Panasonic KT4R User Manual page 108

Serial communication
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
The following operations can be carried out from an external computer.
(1) Reading and setting of the SV, PID values and various set values
(2) Reading of the PV and action status
(3) Function change
Cable length: Max 1.2km, Cable resistance: Within 50
not necessary, but if used, use 120
Communication line: EIA RS-485
Communication method: Half-duplex communication
Synchronization method: Start-stop synchronization
Communication speed: 9600/19200/38400 bps (Selectable by keypad)
Data bit/Parity: 7 bits, 8 bits/Even, Odd, No parity (Selectable by keypad)
Stop bit: 1 bit, 2 bits (Selectable by keypad)
Communication protocol: MEWTOCOL/MODBUS ASCII/MODBUS RTU
Data format:
Communication
MEWTOCOL
protocol
Start bit 1
Data bit 7
Parity Yes (Even)
Stop bit 1
Number of connectable units: Maximum 31 units to 1 host computer
Communication error detection: Parity, LRC (Modbus ASCII),
(Selectable by keypad)
MODBUS ASCII
1
7 or 8
Yes (Even, Odd),
No parity
1 or 2
CRC-16 (Modbus RTU)
(Terminators are
max. on both sides.)
MODBUS RTU
1
8
Yes (Even, Odd),
No parity
1 or 2