User`s manual

Local Logic Configuration

GFK-1742A Chapter 14 Local Logic Configuration 14-5

FBSA Function and CTL Bit Assignments

The backplane Fast Backplane Status Access (FBSA) function will write 4 bits to the DSM and

read 8 bits. The FBSA function is mapped as shown in the following table. For information on the

FBSA service request, refer to GFK-0467L (or later version), the

Series 90-30/20/Micro PLC CPU

Instruction Set Reference Manual

Table 14-3. FBSA Bit CTL Bit Assignments

FBSA Bit Assignments

FBSA Read CTL01-CTL08 CTL01-CTL08 will have an individually configurable source

which includes Local Logic or any DSM faceplate input. The

bits are always readable as PLC %I bits and FBSA inputs.

FBSA

Write

CTL01-CTL24

(Configurable)

FBSA Write Bits 1-4 can be configured as the source for any

of the bits CTL01-CTL24.

FBSA Write Bits 1-2 are the default source for CTL23-24.