Sigma C4 manual Status and Error Reporting

U1 2.3

C1 0

U2 99

C2 100

The C4 will then calculate a new slope and offset for the entire probe curve. All temperatures reported by the corrected probe will be adjusted by applying this new slope and offset to the raw temperature data reported by the probe.

Note: Software probe correction is done separately for each probe. The following table shows the U1, C1, U2, C2 setup parameter assignments:

	Probe 1	Probe 2
U1	F17	F21
C1	F18	F22
U2	F19	F23
C2	F20	F24

Entering these parameters via Setup mode is discussed in Section 8.7 Changing these parameters “on the fly” in Remote mode is discussed in Section 7.6.1

3.9 Status and Error Reporting

There are three sources for error and status information:

The Status Byte	CC-3 compatible
The Error Byte	CC-3 compatible
The Error/Status String
(64 bytes)	CC-3.5 & C4 only

The Status Byte and Error Byte are bit mapped single bytes of data. The Error Byte and the EIA-232 version of the Status Byte are replicated in the Error/Status string. Maintaining the separate Error Byte allows CC-3 programs to run properly on the C4. Their interaction with the SRQ error system is important for all controllers. Here’s how it works:

When an error occurs, the appropriate bit is set in the Error Byte. Setting a bit in the Error Byte, in turn, sets the error bit in the Status Byte. Setting the error bit in the Status Byte sets the SRQ. The SRQ will also be set if either Interval Complete or Setpoint Reached in the Status Byte are set.

34 C4 Manual Rev 7.5.2