Instruction manual

16
8. Specifications
Cable length : Maximum communication distance 1.2km
Cable resistance: Within 50 (The terminator is not necessary or
120 or greater on one side.)
Communication line : Based on EIA RS-485
Communication : Half-duplex
Communication speed : 9600bps (2400, 4800, 9600, 19200bps) Selectable by keypad operation
Synchronous system : Start-stop synchronous
Code form : ASCII, binary
Error correction : Command request repeat system
Error detection : Parity check, Checksum (LRC), CRC
Data format Start bit : 1
Data bit : 7, 8
Parity : Even, Odd, No parity
Stop bit : 1, 2
9. Troubleshooting
If any malfunctions occur, refer to the following items after checking the power supply to the master
and the slave.
• Problem: If it is unable to communicate
Check the following
The connection or wiring of communication is not secure.
Burnout or imperfect contact on the communication cable and the connector.
Communication speed of the slave does not coincide with that of the master.
The data bit, parity and stop bit of the master do not accord with those of the slave.
The instrument number (address) of the slave does not coincide with that of the command.
The instrument numbers (addresses) are duplicated in multiple slaves.
When communicating without using Shinko communication converter (IF-300-C5), make sure that
the program is appropriate for the transmission timing.
•
Problem: Though it is able to communicate, the response is 'NAK'.
Check the following
Check whether a non-existent command code has been sent or not.
The setting command data goes outside the setting range of the slave.
The controller cannot be set when functions such as AT is performing.
The operation mode is under the front keypad operation setting mode.
If you have any inquiries, please consult our agency or the shop where you purchased the unit.
SHINKO TECHNOS CO.,LTD.
OVERSEAS DIVISION
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:
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Reg. Office
Mail Address
URL
E-mail
1-2-48, Ina, Minoo, Osaka, Japan
P.O.Box 17, Minoo, Osaka, Japan
http://www.shinko-technos.co.jp
[e-mail]
Tel :
Fax:
81-72-721-2781
81-72-724-1760