Instruction manual

5. RKC COMMUNICATION PROTOCOL
IMR01H02-E3
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About numerical data
The data that receipt of letter is possible
• Data with numbers below the decimal point omitted or zero-suppressed data can be received.
(Number of digits: Within 6 digits)
<Example> When data send with -001.5, -01.5, -1.5, -1.50, -1.500 at the time of -1.5, controller
can receive a data.
• When the host computer send data with decimal point to item of without decimal point, controller
receives a message with the value which cut off below the decimal point.
<Example> When setting range is 0 to 200, controller receives as a following.
Send data
0.5 100.5
Receive data
0 100
• Controller receives value in accordance with decided place after the decimal point. The value
below the decided place after the decimal point is cut off.
<Example> When setting range is -10.00 to +10.00, controller receives as a following.
Send data
-.5 -.058 .05 -0
Receive data
-0.50 -0.05 0.05 0.00
The data that receipt of letter is impossible
Controller sends NAK when received a following data.
+ Plus sign and the data that gained plus sing
- Only minus sign (there is no figure)
. Only decimal point (period)
-. Only minus sign and decimal point (period)
(4) ACK (Acknowledgment)
An acknowledgment ACK is sent by the controller when data received is correct. When the host
computer receives ACK from the controller, the host computer will send any remaining data. If there
is no more data to be sent to controller, the host computer sends EOT to terminate the data link.