6. TROUBLESHOOTING
IMSRM04-E8
72
In this section, an explanation is given of the presumed causes and measures of general problems
when transmission can not be carried out correctly.
When abnormalities are suspected in the control, operation, operation panel or control unit (Hardware
related problems), see the troubleshooting items in the appropriate separate Operation Panel
Instruction Manual or Hardware Instruction Manual.
Symptom Presumed cause Solution
No response The control unit power is not turned on Turn on the power
There is a mistake in the communication cable
connections
Confirm the connection method
Breakage in the communication cable Replace the cable
Detachment of the communication cable Confirm the connection condition
Problems with the connectors or contacts Check and replace the wiring in the
connector
The communication speed or bit structure
settings are different
Confirm each setting
The address specification is different Confirm the address numbers
There is a difference in the structure of the
transmission data
Change to a structure that matches
the identifier
Breakdown of this instrument Replace the instrument or request
repairing
EOT has been
transmitted
The identifier has been mistaken Confirm the identifier
The identifier specified is not in this
instrument specification
Confirm the identifier
The block data length of the transmission
exceeds 128 bytes
Divide the block using ETB before
sending it
NAK has been
transmitted
The data exceeds the setting range of this
instrument
Confirm the transmitting data range
The data length exceeds the specification of
this instrument
Confirm the transmitting data
length
The identifier specified is not in the
specification of this instrument
Confirm the identifier
BCC error occurred Confirm transmitting data, Re-send
data
The transmission mode of the operation panel
is set to local mode
Change to computer mode
An error code
has been
transmitted
See 6.2 Error code descriptions (Identifier: ER)
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