R01AN5644EJ0100 Rev.1.00
Page 37 of 62
Jan 22, 2021
Reference Guide for a 2-Axis Robot Arm with 2-Phase Stepping
Motors Incorporating Resolvers
RX24T, RX72M,
RAA3064002GFP/RAA3064003GFP
2.3.5 Error Processing
The NC software determines whether a response from the RX24T is an error and handles error processing if
an error has occurred. The following shows the error determination flow and its details and processing.
Figure 2-3 Error Determination Flow
Table 2-5 Modbus Frame Judgment
No.
Error Condition
A-1
A response was received during broadcasting.
A-2
A timeout has occurred because a response could not be received.
A-3
The CRC in the received response does not match.
A-4
The function code in the received response is an exception code.
A-5
The function code in the received response does not match.
A-6
The slave address in the received response does not match.
Error
Receive RX24T response
Normal end
Normal
Modbus frame
judgment
Retry possible?
RX24T state
judgment
Error processing
Send message to GUI
Erroneous end
Error
Normal
No
Re-send Modbus command
Error determination flow
Yes
Update RX24T information
held by RX72M