Siemens sitrans LU01 Manuál s instrukcemi stáhnout pdf (Strana 52)

Page 46 SITRANS LU01 – INSTRUCTION MANUAL 7ML19985BE02

Parameters

For IN-BOUNDS and OUT-OF-BOUNDS Relay Functions (P111 = 2 and 3 respectively), a

dead band prevents relay chatter due to material level fluctuations at both the upper and

lower setpoints.

Independent Relay Failsafe (P129)

P129 Relay Failsafe

Sets the failsafe operation per relay to allow for more flexible programming.

Use this for operations independent of the Failsafe Material Level (P070).

Relay Failsafe is only available for the following relay functions (P111) and is not used for

any other relay control function.

To select an independent Relay Failsafe value:

1. Press FUNCTION to display the Auxiliary Function symbol.

2. Press ARROWS to scroll through the failsafe options.

3. Select option and press ENTER .

Enter the dead band in either percent of

span or units of measure (P005). The

deadband value is applied both above

and below the upper and lower bound

setpoints as shown in the figure.

Primary Index Relay

Values

OFF * Response governed by P071 Failsafe Material Level

HOLd For LAST KNOWN relay state retention

dE To have the relay de-energize immediately on failsafe

En To have the relay energize immediately on failsafe

Altered by • P071 Failsafe Material Level

• P070 Failsafe Timer

• P111 Relay Control Function

Relay Function (P111) Preset (P129)

1 – level alarm

OFF

2 – in bounds alarm

3 – out of bounds alarm

4 – rate of change alarm

5 – temperature alarm

50 – all pump controls dE

Actual ON or OFF setpoint

Actual OFF or ON setpoint

P116, deadband

Setpoint set in P112 or P113

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 113 114

Žádné komentáře

Siemens sitrans LU01 Manuál s instrukcemi Strana 52