Delta AS Series Manual page 328

AS Ser ies M od ul e Man ua l
2) RTU Mode: (AS Series PLC acting as a Scanner)
RTU Error Code: refer to Section 9.7 for more information.
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I/O Module Error Code: refer to the I/O module manual for more information.
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RTU Operation Status: 0 = communication module stop, 1 = communication module run
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3) RTU Mode: (AH Series PLC acting as a Scanner)
RTU State: 0 = communication module is working fine, 1 = communication module is NOT working fine.
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RTU Error Code: refer to Section 9.7 for more information.
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Power State:０= power error, 1 = power normal
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I/O Module State: each I/O module uses 1 bit to show its status (0 = normal , 1 = not running normally)
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I/O Module Error Code: refer to the I/O module manual for more information.
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RTU Operation State: 0 = communication module stop, 1 = communication module run
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