Emerson HASXEE-IM-HS - page 312

Emerson Process Management GmbH & Co. OHG7-34
X-STREAM XE
Instruction Manual
HASXEE-IM-HS
10/2010
7.4.4 Remote Calibration
Fig. 7-7: Digital Inputs - Examples of Sequences
Cancel
Calibration
Span
calibration
Zero
calibration
If signals are applied as shown, then
• IN1 (A) starts a zero calibration (Z1)
• the detection window (300 - 500 ms after edge) for IN2 (B) begins while the zero calibration (Z1) is ongoing: Signal
(B) is ignored
• the edge of IN1 (C) is detected and the associated zero calibration (Z2) is started
• the detection window (300 - 500 ms after edge) for IN2 (D) begins after the zero calibration (Z2) has ended, so
the span calibration (S1) is started
• the span calibration (S1) is canceled by the falling edge of IN3 (E)
Examples
The sequences shown in Fig. 7-7 are based on the following setup for digital inputs IN1 to IN3:
• IN1 starts a zero calibration, initiated by a rising edge
• IN2 starts a span calibration, initiated by a rising edge
• IN3 cancels all calibrations with its falling edge