Rockwell Automation 1785-CHBM ControlNet PLC-5 Hot Backup System User Manual User Manual
Page 74
Publication 1785-UM024B-EN-P - January 2003
5-10 Monitoring and Troubleshooting Your ControlNet PLC-5 Hot Backup System
11
Equivalence checks; there are 6 bits defined (i.e., one bit per equivalence
check). If a bit is set, the corresponding equivalence check will be
performed. If the bit is not set, no check is performed. By default, all
equivalence checking is enabled. The remaining 10 bits in the word must
be set to 0.
Bit 0 - Ladder Logic equivalence check
Bit 1 - Data Table Structure equivalence check
Bit 2 - I/O Map Table equivalence check
Bit 3 - Backup Configuration and Status file equivalence check
Bit 4 - Force Table equivalence check
Bit 5 - Status file equivalence check
12
Designated Primary. Valid values are:
0 - No Designated Primary (default)
1 - The PLC-5 processor with the odd node address is the Designated
Primary
13
Qualification Delay. This is the amount of time (in ms) to delay the
secondary in Run mode before becoming qualified. The default value is 0.
14
Maximum Program Scan Time (Synchronous mode only); the amount of
time (in ms) for the largest program scan. This value cannot be greater
than 127 times the NUT value.
15-19
reserved
20-24
These words are functionally the same as words 10 through 14. The
difference is that words 20 through 24 display the current internal PLC-5
processor state of these configuration parameters. When in Run mode,
the PLC-5 processor will continuously update words 20 through 24. In
other words, the software tool will write the configuration parameters
into words 10 through 14, while the PLC-5 processor will write its
internal PLC-5 processor state of these configuration parameters into
words 20 through 24. When you accept configuration changes, the
configuration parameters in words 10 through 14 are copied into words
20 through 24.
25
Adjusted Maximum Program Scan Time. This word is the Maximum
Program Scan Time parameter, rounded up to the next integer multiple of
the NUT value. This word is written by the PLC-5 processor, and is
continuously updated while the processor is in Run mode.
26
The number of NUTs per Maximum Program Scan Time. This word is the
number of NUTs in the Adjusted Maximum Program Scan Time. This
word is written by the PLC-5 processor, and is continuously updated
while the processor is in Run mode.
27
The NUT time, in 10 microsecond units, is continuously written here
while the processor is in Run mode.
28
Configuration status. This word gives either the reason why the
configuration attempt was unsuccessful, or whether the configuration
parameters were overwritten because the system went into Run mode as
a secondary system.
6 - Operation mode word invalid
7 - Equivalence Check word invalid
8 - Designated Primary word invalid
9 - Max Program Scan Time word invalid
10 - Configuration parameters were overwritten by the primary system
12 - Crossload parameter invalid
29
reserved
Word
Definition