Panasonic KT4R - Page 57

7. Specifications
Cable length 1.2 km (Max.), Cable resistance: Within 50 (Terminators are not necessary,
but if used, use 120 or more on both sides.)
Communication interface EIA RS-485
Communication method Half-duplex communication
Communication speed 9600, 19200, 38400 bps (Selectable by keypad)
Synchronization method Start-stop synchronization
Code form ASCII, binary
Data bit/Parity Data bit: 7, 8, Parity: Even/Odd/No parity (Selectable by keypad)
Stop bit 1, 2 (Selectable by keypad)
Communication protocol MEWTOCOL/Modbus ASCII/Modbus RTU/
Modbus ASCII (KT4 command allocation)/
Modbus RTU (KT4 command allocation)
(Selectable by keypad)
Data format is different depending on the communication protocol.
MEWTOCOL Modbus ASCII Modbus RTU
Start bit 1 1 1
Data bit 7 or 8 7 or 8 8
Parity
Yes (Even, Odd),
No parity
Yes (Even, Odd),
No parity
Yes (Even, Odd),
No parity
Data format
Stop bit 1 or 2 1 or 2 1 or 2
Number of connectable
units
Max 31 units to 1 host computer
Error correction Command request repeat system
Error detection Parity check, BCC (MEWTOCOL), LRC (Modbus ASCII),
CRC-16 (Modbus RTU)
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com