Explanation Of Each Function Code; No Response - Omron 3G3JX User Manual

4-2 Function Mode
<No Response>
The Inverter ignores a query and does not respond when:
•The broadcast is received.
•A communication error is detected in receiving a query.
•The query slave address does not correspond with the slave address set for the Inverter.
•The time interval between 2 pieces of data constituting the message is less than a 3.5-character
length.
•Query data length is inappropriate.
•The reception interval in a frame exceeds the 1.5-character length.
Note: Provide a timer in the master to monitor the response, and if no response is returned within
4

Explanation of Each Function Code

<Coil status reading [01h]>
Reads out the coil status (ON/OFF).
(Example)
When reading multi-function input terminals from 1 to 5 of the Inverter with the slave address "8"
Refer to the following table for the multi-function input terminal statuses. (Coils from 12 to 14 are
OFF.)
Multi-function input terminals
Query
No.
1 Slave address
2 Function code
3 Coil start number (MSB)
4 Coil start number (LSB)
5 Number of coils (MSB)
6 Number of coils (LSB)
7 CRC-16 (MSB)
8 CRC-16 (LSB)
*1. Broadcasting cannot be performed.
*2. When specifying the value for 0 or over 31 of the reading coils, the error code "03h" is sent.
*3. Data is transferred by the number of data bytes.
4-83
the set time period, send the same query again.
Class
Coil No.
Terminal status
Example
Field name
(HEX)
*1
08
01
00
06
*2
00
*2
05
1C
91
Data
1 2 3 4
7 8 9 10
ON OFF ON OFF
Response
No.
1
2
3
4
5
6
5
11
OFF
Example
Field name
Slave address
Function code
Number of data bytes
*3
Coil data
CRC-16 (MSB)
CRC-16 (LSB)
(HEX)
08
01
01
05
92
17