Red Lion TCU - Manual (Page 36)

Lockouts Module (3-LC)
The controller can be programmed to limit operator access to various
parameters, control modes, and display contents. The configuration of the
lockouts is grouped into three sections: Lower Display Lockouts, Protected
Mode Lockouts and Hidden Mode Lockouts.
Lower Display Lockouts (SP, OP, HCur, IN-2, dEv, UdSP)
The contents of the secondary display can be changed in the normal display
mode by successively pressing the DSP button. This action scrolls through
the possible display parameters, when enabled.
The parameters can be set for one of the following:
LOC (Lockout) - Prevents the parameter from appearing in the
secondary display.
rEd (Read only) - Parameter appears, but cannot be modified.
Ent (Entry) - Parameter appears and can be modified.
The lower display content possibilities are:
SP - Setpoint Value
OP* - % Output Power
IN-2* - Second analog input (Remote setpoint)
HCur* - Heater current reading
dEv* - Setpoint Deviation
UdSP - Temperature Units
If all parameters are set to lock “LOC”, the display remains on the last
parameter that was viewed.
*Note: These parameters are model specific and may not appear in the
programming sequence.
Note: If a parameter is active in the lower display and is then subsequently
locked out, press “DSP” once in the normal display mode to remove it from
the display.
Protected Mode Lockouts (Code, PID, PID2, rtbS & AL)
The protected mode is active when program disable is active. The
parameters in the protected mode can be set for one of the following modes:
LOC (Lockout) - Prevents the parameter from appearing in the
protected mode.
rEd (Read only) - Parameter appears, but cannot be modified.
Ent (Entry) - Parameter appears and can be modified.
The code number allows access to the unprotected mode. To enter the
unprotected mode from the protected mode, the code number entered must
match the code number entered here. See
Front Panel Program Disable, page
12, for a description of the various program access levels.
Code - 0 to 250
PID - Permits access to the main PID parameters
PID2 - Permits access to the secondary PID parameters
rtbS - Permits access to Remote Setpoint ratio and bias
parameters
AL - Permits access to the alarm value(s).
Hidden Mode Lockouts (ALrS, trnF, tUNE and SPSL)
The hidden mode is accessible from the normal display mode by pressing
and holding the PAR button for three seconds. The parameters can be set for:
LOC (Lockout) - Prevents the parameter from appearing in the
hidden mode.
ENbL (Enable) - Allows operator to perform the selected hidden
mode function.
The functions available in the hidden mode are accessible independent of
the status of program disable.
ALrS - Reset (override) the alarm output(s).
SPSL - Select Local or Remote Setpoint operation.
trnf - Select Automatic or Manual operation.
tUNE - Invoke or cancel Auto-Tune.
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