FACTS Engineering Direct Logic 405, Manual

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INSTALLATION AND WIRING 2.8
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 Operating Mode & Loops Enabled Error Flag Version
0 V7660 V7670 V7710 V7730
1 V7661 V7671 V7711 V7731
2 V7662 V7672 V7712 V7732
3 V7663 V7673 V7713 V7733
4 V7664 V7674 V7714 V7734
5 V7665 V7675 V7715 V7735
6 V7666 V7676 V7716 V7736
7 V7667 V7677 V7717 V7737
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.