Dedicated V-Memory Map - FACTS Engineering Direct Logic 405 Manual

DEDICATED V-MEMORY MAP

Each Temperature Controller has three dedicated V-Memory locations associated with it to specify the
starting address of the Temperature Controller Parameters table, the number of temperature control
loops enabled (scanned) for that module, and a location for the module to return configuration and self
diagnostic error flags.
The dedicated V-Memory locations are only read by the Controller at power-up.
These memory locations must be made retentive if the module should operate when the PLC powers up
in program mode.
Slot Table Beginning Address
0 V7660
1 V7661
2 V7662
3 V7663
4 V7664
5 V7665
6 V7666
7 V7667
Table Beginning Address
The beginning address of the Controller parameter table is specified by a V-Memory pointer stored in the
modules Table Beginning Address location. Normally the Table Beginning Address will be in retentive
V-Memory, (memory above V2000).
Note The range of valid Table Beginning Addresses is V1400 to V7500. The parameters table
cannot be located in the higher user V-Memory locations provided on some DL405
CPUs. For example, the table cannot be located in the V10000 to V17777 memory
range of a DL440 CPU.
Example: To specify V5000 as the Temperature Controller parameter table beginning address for a
Controller in slot 4, V7664 would contain the BCD number 5000.
2.8
Operating Mode & Loops Enabled
V7670
V7671
V7672
V7673
V7674
V7675
V7676
V7677
INSTALLATION AND WIRING
Error Flag Version
V7710 V7730
V7711 V7731
V7712 V7732
V7713 V7733
V7714 V7734
V7715 V7735
V7716 V7736
V7717 V7737