Command Interface Timing Diagram

Appendix C - Communications Gateway Module (CGM) Connection Details

	Write Command	Read Command
Automation Outputs (PCF Inputs)
Command Bits 256-275	Bits Set	Bits Set
Value Bits 288-319	Bits Set
Write Bit 321
Read Bit 320
Automation Inputs (PCF Outputs)
Value Bits 128-159	Bits Set	Bits Set
Command Active Bit 160
Command Success Bit 161
Command Failure Bit 162
Command Value Coerced Bit 163

FIG. 73: CGM Command Interface Timing Diagram

1.Set Command Identification Bits and Fluid Plate/Swirl Identification Bits to the desired values.

2.Set Value Bits (Output) with the value that is desired to be written.

3.Set Write Bit.

4.Wait for the Command Active Bit to become set. This indicates that an operation is in process.

5.Wait for the Command Success Bit, Command Fail- ure Bit, or Command Value Coerced Bit to become set.

NOTE: The Value Bits (Input) now contain the value that was actually written.

6.Clear the Write Bit to end the write command opera- tion.

4.Wait for the Command Success Bit or Command Failure Bit to become set.

NOTE: If Command Success Bit has been set, valid data will be present within the Value Bits (Input).

5.Clear the Read Bit to end the read command opera- tion.

1.Set Command Identification Bits and Fluid Plate/Swirl Identification Bits to the desired values.

2.Set Read Bit.

3.Wait for the Command Active Bit to become set. This indicates that an operation is in process.

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