Allen-Bradley 1404-M4, User Manual

Page: 167 / 356

Publication 1404-UM001D-EN-E - October 2004
Advanced Features 8-17
Reading the Load Factor Log
To select the read-back mode or record, an auto reset/store day of the
month, or issuing a manual reset/store command, perform a table
write to Table A.41. Load factor log data is not available via Modbus
communications. This read/write table contains 6 integer elements as
follow:
•
Password: required for changing the auto clear/reset day or
manual clear/reset command. Use -1 if only selecting read-back
mode or record. Range 0000 to 9999, default 0000. Returns -1
•
Record select: selects the next read-back record
•
Read-back mode: 0 = auto-increment record number after each
read, 1 = manual increment. Auto-increment not supported in
DeviceNet and Ethernet optional communications.
•
Manual clear/reset command: 0 = do nothing, 1 = manual
clear/reset command (see above)
•
Auto clear/reset day: Selects the day of month for automatically
storing and clearing the current in-process record. Range 0 to 31;
0 disables automatic clear/reset, 1 to 28 selects day of month, 29
to 31 selects last day of month
•
Reserved: reserved element must be 0 on a write, returns 0
The results table is Table A.42. You may read the in-process Record 0
or one of the 12 logged records. This table contains the following 14
floating-point elements:
•
Peak demand power: expressed in watts. Range 0.0 to 999.9*10
21
•
Average demand power: expressed in watts. Range 0.0 to
999.9*10
21
•
Load factor power: expressed in per cent. Range 0.0 to 100.0
•
Peak demand reactive power: expressed in VARs. Range 0.0 to
999.9*10
21
•
Average demand reactive power: expressed in VARs. Range 0.0
to 999.9*10
21
•
Load factor reactive power: expressed in per cent. Range 0.0 to
100.0
•
Peak demand apparent power:
expressed in VARs. Range 0.0 to
999.9*10
21
•
Average demand apparent power: expressed in VARs. Range 0.0
to 999.9*10
21
•
Load factor apparent power: expressed in per cent. Range 0.0 to
100.0
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