Rockwell Automation 1503VC IntelliVAC Plus Contactor Control Module - Manual (Page 177)

B-2 Parameters
1503-UM054C-EN-P – June 2013
Table B.1 – Status Word for IB1
Bit Enum Text Description
0 Bit 0: unused unused
1 Bit 1: unused unused
2 Bit 2: unused unused
3 Bit 3: Power Up with Contactors Closed Power Up with Contactor Closed IB1
4 Bit 4: Open Coil Open Trip Coil Open on IB1
5 Bit 5: Close Coil Open Close Coil Open on IB1
6 Bit 6: Power Up with Invalid DIPs Power Up with Invalid DIPs on IB1
7 Bit 7: MC Malfunction MC Malfunction on IB1
8 Bit 8: Drop Out During Hold Drop Out During Hold on IB1
9 Bit 9: Contactor Fails to Drop Out Contactor Fails to Drop Out on IB1
10 Bit 10: Power Up with Close Command Power Up with Close Command on IB1
11 Bit 11: Long Close Time Long Close Time on IB1
12 Bit 12: Undervoltage with Close
Command Present
Undervoltage with Close Command
Present on IB1
13 Bit 13: Long Drop Out Time Long Drop Out Time on IB1
14 Bit 14: Mechanical Latch Trip Fail Mechanical Latch Trip Fail on IB1
15 Bit 15: Invalid Command Invalid Command on IB1
The description in the manual will always be structured in the same
way. The top most description (in this case not used) is always the
least-significant bit, or right-most bit. As you move down the list of
descriptions, you advance to the left on the bit-encoded word. Any
unused bits will be identified, but unused bits will nave no
description. This is why a 16-bit word may only have a few
descriptions. The rest are reserved for future expansion.
When a bit-encoded parameter is viewed in its associated group, it is
actually displayed as a hexadecimal number. The right-most four
bits represent the right-most hexadecimal digit. Each subsequent
group of 4 represents the next hexadecimal digit.
Table B.2 below illustrates the relationship.
Table B.2 – Sample Bit to Hexadecimal Conversion
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Value 8 4 2 1 8 4 2 1 8 4 2 1 8 4 2 1
Example
1 1 1 0 0 1 0 0 0 1 1 1 1 1 1 1
8 + 4 + 2 + 0 0 + 4 + 0 + 0 0 + 4 + 2 + 1 8 + 4 + 2 + 1
Sums E 4 7 F
When you display a specific bit-encoded parameter, or choose to
modify a bit-encoded parameter, it will be displayed in bit format,
with an individual description of each bit (see Table B.3). When
modifying a parameter, selecting the bit parameter will allow it to be
altered.