Yokogawa EJX930A User 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