LSIS S100 Option Manual

S100 PROFInet Option Manual
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9 Fault Message Counter (PNU[944]) and Fault Number (PNU[947])
The Fault Message Counter (PNU[944]) parameter value increases by 1 each time an
inverter fault occurs, and the fault is saved at the Fault Number (PNU[947]) parameter.
The Fault Number (PNU[947]) parameter can save 8 Fault Situations, and each Fault
Situation contains 8 Fault Messages. A Fault Message consists of one 16bit word, and
the Fault Number (PNU[947]) parameter consists a total of 64 words.
See the following diagram for the basic operation.
In the diagram, the current Fault Message is saved at Fault Situation #1. Each fault
message is saved based on the time of occurrence, from index 0 to 63.
The fault messages are written (overwritten) to the memory when every eighth fault
message in each Fault Situation is saved at index 7, 15, 23, 31, 39, 47, 55, and 63.
When the PLC’s control word bit 7 is set to 1, a “Fault Ack” is triggered, which in turn
increases the Fault Situation number by 1 until it becomes 7 (Fault Situation #7).
The saved Fault Messages match the inverter trip information (latch type trip info-1,
latch type trip info-2, level type trip info, H/W Diagnosis Trip info) as defined in the

LSIS S100 Specifications

General

Brand	LSIS
Model	S100
Category	DC Drives
Language	English