RKC INSTRUMENT AE500 - Page 31

4. PROTOCOL
IMAE02-E3
25
(3) Data sent from the host computer
The host computer sends data for the selecting sequence with the following format:
For the STX, ETX and BCC, see 4.1 Polling (P. 19).
1. Identifier (2 digits)
The identifier specifies the type of data that is requested from the AE500, such as set value.
For details, see 4.3 Communication Identifier List (P. 28).
2. Data (Maximum 6 digits)
Data is the information being sent to the AE500. It is expressed in decimal ASCII code including
a minus sign (-) and a decimal point (period).
z
zz
z
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.
<Example> When data send with -001.5, -01.5, -1.5, -1.50, -1.500 at the time of -1.5, AE500 can
receive a data.
• When the host computer send data with decimal point to item of without decimal point, AE500
receives a message with the value which cut off below the decimal point.
<Example> When setting range is 0 to 200, AE500 receives as a following.
Send data
0.5 100.5
Receive data
0 100
• AE500 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, AE500 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
AE500 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)
Identifier Data BCCETXSTX
2.1.