Watlow Series 935A - Manual (Page 20)

1 8 Watlow Series 935A User’s Manual
The Series 935A offers three different security, or “lockout,” options. Set up one or all three lockout op-
tions in the Configuration Menu.
∫
• Front Panel Lock [`FPL] uses a control output as an input for an external hardware switch; it
requires wiring, see p. 23. Choose Front Panel Lock [`FPL] as an exclusive Output 1 choice.
Output 2 offers heat, cool, or alarm.
• Choose Set Point Lock [SLOC] as the simplest lockout option. It locks the Primary Set Point
from change, but not from view.
• Choose the Security Tag [`tAG] as a means of masking the Series 935A software menus from
view. By selecting all or part of the four-digit binary acronym, [PCOA] (Proportional / Configuration
/ Operation / Auto-tune), you can choose to mask those items from view, and therefore from
change. For example: In the Configuration Menu
[`tAG] set-up, if you can see the P, the opera-
tor cannot see the PID menu.
• Exceptions to [PCOA] [`tAG] are:
“C” does not lock out [`tAG] .
“O” does not lock out [CnFG] .
∫
WARNING: When Output 1 is a Front Panel Lock [`OT1] = [`FPL] , the output is energized!
Do not connect a power switching device to Output 1; injury or death or damage to
equipment or property could result.
Configuration Menu
[``In]
Input Type
[`C_F]
Celsius/Fahrenheit
[``rL]
Input Range Low
[``rh]
Input Range High
[`Ot1]
✓
Output 1 Function
[`Ot2]
Output 2 Function
[dISP]
Display Default
[ALty]
Alarm Type
[AhYS]
Alarm Hysteresis
[`LAt]
Alarm Latch
[`SIL]
Alarm Silencing
[FAIL]
Failure Mode
[tIM]
Timer Function
[Strt]
Start Timer
[`rdY]
Timer Ready Band
[``St]
Signal Time
[SLOC]
✓
Set Point Lockout
[`tAG]
✓
Lockout Tag
Using Lockout Functions