Table of Contents
Advertisement
CD Automation srl
13 Detection of malfunctions
The instrument can detect the following abnormal conditions of the process variable:
• over-range
• under-range
• sensor leads break
The condition of over-range is displayed by the characters "Undr" flashing in the upper display.
The condition of over-range is displayed with "oVrr" in the upper display.
Table 1 shows the state of OUT1 and OUT2 at the conditions of range of under-and over-range, according
to the device settings (control mode heating / cooling and SEcF parameter value). The first four lines
delineate the standard configuration.
Heating/
condition
Cooling
under-range
NO
over-range
NO
under-range
SI
over-range
SI
under-range
---
over-range
---
under-range
---
over-range
---
under-range
---
over-range
---
Table 1: security state Stati di sicurezza of the output in out-of-range condition.
Breakage of the temperature sensor can be reported as:
• over-range o under-range (configurable) for input TC/mV
• over-range for input RTD
• under-range for input mA / V (only with zero elevation)
OUT1
SEcF
reverse
0
ON
0
OFF
0
0
1
SEcO
1
SEcO
2
standard
2
SEcO
3
SEcO
3
standard
pag. 27 di 121
direct
reverse
OFF
ON
ON
OFF
OUT2
direct
---
---
---
---
OFF
ON
SecO
SecO
standard
SecO
SecO
standard
Advertisement
Table of Contents
Need help?
Do you have a question about the Revo TC and is the answer not in the manual?