Yokogawa EJX930A - Manual (Page 54)

<6. Modbus communication Troubleshooting>
6-2
IM 01C25R05-01EN
Abnormality
phenomenon
Remedy
Priority Item Explanation Reference
In the case that
Exception code SLAVE
DEVICE FAILURE
(0x04) is returned
1 EEPROM in the CPU assembly is damaged. Contact
Yokogawa service personnel for replacing CPU
assembly or device.
IM01C25R05-01EN
“EJX910A
and EJX930A
Multivariable
Transmitters” 9.
Maintenance
In the case that
Exception code SLAVE
DEVICE BUSY (0x06) is
returned
1 Under write processing to EEPROM in the CPU
assembly. Retry after 2 or 3 seconds waitting.
5. Modbus
Communication
The writing data is
ignored
1 Confirm “write protect” setting. 2.1.1 The Hardware
Switch
3.4.6 Software Write
Protection
2 Confirm if the writing data is outside the limit of Modbus
specification of the device.
5. Modbus
Communication