Watlow 8LS Controller Uživatelský manuál stáhnout pdf (Strana 127)

Appendix B: 8LS-CP

8LS User’s Guide 119

Setup Alarms

CP Gas Alarm

This menu is available from the Setup Alarms main menu. Use it to set

the digital output number for the CP trim gas alarm output. This output

is On when the temperature of the T/C Reference Loop is between 1400

to 2400

F and Off when the temperature is outside these limits. When

setting it to 0, the CP GAS output is disabled.

Selectable Range:

1-30, or 0.

CP and DP Display

The display of the carbon probe loop process variable depends upon the

input values of the T/C Reference Loop and the probe millivolt level.

In order to display the engineering values of the input, both the T/C and

probe loops must be within limits of the carbon probe variables for

correct reading of the probe.

•

If the CP loop is in automatic mode, an out of range reading will set

both CP control outputs to 0.

•

If the control is in manual mode, it will not effect the outputs.

The next table shows the CP loop out of range indications.

Process condition Indication

Reference T/C is below 1400

FLOT

Reference T/C is above 2400

FHIT

Probe MV is below 960 MVDC LOV

Probe MV is above 1275 MVDC HIV

1234 56 78

LOOP PROCESS UNITS

ALARM

SETPOINT

STATUS

OUTPUT%

2CP GAS

OUTPN? 0

1234 56 78

LOOP PROCESS UNITS

ALARM

SETPOINT STATUS OUTPUT%

2 HIT %CP

. 25 M 0

1 2 ... 122 123 124 125 126 127 128 129 130 131 132 ... 139 140

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