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6 MAINTENANCE
• Has the remote module the correct transmit area setting?
If the transmit area setting is incorrect, correct it. A transmitted word count of 0 would
inhibit transmission.
• Has the remote module the correct module and CPL number settings?
Verify the correct switch settings. A certain relationship dependent on the number of units
connected exists between the module number setting switch and the CPL numbers setting
switch. (See "4.2 Setting Switch.") Further, a switch setting defined in duplicate would
also inhibit success data transfers.
Data is not transmitted to a remote module.
• Is the remove module switch set to RUN?
Memory transfers would not execute if the CPU or LPU module switch is not set to RUN.
• Has the local module the correct transmit area setting?
If the transmit area setting is incorrect, correct it. A transmitted word count of 0 would
inhibit transmission.
• Has the remote module the correct module and CPL number settings?
Verify the correct switch settings. A certain relationship dependent on the number of units
connected exists between the module number setting switch and the CPL number setting
switch. (See "4.2 Setting Switch.") Further, a switch setting defined in duplicate would
also inhibit success data transfers.
Data in the transfer area is corrupted.
• Has the data transfer module the correct transmit area setting?
If the transmit area setting of the data transfer module is incorrect, correct it.
• Does the transmit area not overlap between multiple modules?
An overlapping transmit area would corrupt the overlapping portion of data.
• Has the transfer area not been rewritten by the user program?
If possible, halt the user program and verify it.
Transferred data has been cleared to 0.
• Has the data transmitting module not shut down?
If the hold/clear mode has been set to clear, the transfer area is cleared to 0 as soon as data
transmission terminates.
• Is the data transmitting module switch not set to STOP?
If the CPU or LPU module switch is set to STOP, transfer area transmission would be
inhibited. If the hold/clear mode has been set to clear, the transfer area is cleared to 0.
6-14
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