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Section 7
7.1 No acknowledge message (Acknowledge message not yet received)
V700-L21
User's Manual
Section 7
Troubleshooting
If a fault should occur, first thoroughly study the symptom in order to be able to correctly judge the
reproducibility of a problem, and interaction with other associated equipment. Thus, find an appropriate
remedy.
7.1 No acknowledge message (Acknowledge message
not yet received)
State of indicators ( : lit, : unlit, : flashing)
Typical checkpoint
POWER OPERATING ALARMS BUSY ERROR
24 VDC power supply
* The CIDRW controller may have been damaged.
Contact the manufacturer.
• MODE switch setting
* If the MODE switch is found to be correctly set, the
CIDRW controller may have been damaged. Contact
the manufacturer.
* The CIDRW controller may have been damaged.
Contact the manufacturer.
• MODE switch setting
• MODE switch setting
• MODE switch setting
• Cable connections (the wiring connections are con-
figured for accessing the parameter setup mode?)
• MODE switch setting
<MODE switch is in correct position>
• Communications parameters for transactions
between CIDRW controller and upstream controller
(Baud rate, character structure, etc.)
• Node No. setting for link unit (particular node No. has
been assigned to two or more link units)
(Acknowledge message is not yet verified)
• MODE switch setting
• Power supply to link unit
• Baud rate setting for link unit
• Node No. setting for link unit (particular node No. has
been assigned to two or more link units)
• Cable connections and wiring between CIDRW con-
troller and link unit
• Connections of IDRW heads, and wiring for extension
cable
• Routing of various cables (adverse effect by external
noise interference)
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