TUG MZ Operation Maintenance & Parts Manual page 407

Curtis 1234/36/38 Manual,
1 1 J U LY 2 0 0 8 D R A F T
SET_INTERLOCK()
This function is used to engage the system interlock using VCL. The 1311 Interlock
Type parameter must be set to = 1 in order for the Set_Interlock() function to operate.
If the system interlock is set (Interlock_State bit variable = On), the throttle input
signal is allowed to pass along the throttle chain; see Figure 14. Additionally, if the
main contactor is used (1311 Main Enable parameter = On), setting the interlock
will request the main closed state from the main contactor state machine. To view
the current interlock state, see the 1311 menu Monitor
current main contactor state, see the 1311 menu Monitor
When the Interlock_Type is set to = 1 and neither the Set_Interlock() nor the
Clear_Interlock() function has been called, the state for the interlock is Off (Inter-
lock_State bit variable = Off).
Syntax
Set_Interlock()
Parameters None.
Returns
0 – Interlock not set.
1 – Interlock successfully set.
Error Codes None.
Example
Set_Interlock()
This will engage the system interlock.
CLEAR_INTERLOCK()
This function is used to disengage the system interlock using VCL. The 1311 In-
terlock Type parameter must be set to = 1 in order for the Set_Interlock() function
to operate. If the system interlock is cleared (Interlock_State bit variable = Off), the
throttle input signal is not allowed to pass along the throttle chain; see Figure 13.
Additionally, if the main contactor is used (1311 Main Enable parameter = On),
clearing the interlock will request the main open state from the main contactor state
machine. To view the current interlock state, see the 1311 menu Monitor
Interlock. The view the current main contactor state, see the 1311 menu Moni-
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tor Controller: Main State.
When the Interlock_Type is set to = 1 and neither the Set_Interlock() nor
Clear_Interlock() function has been called, the default state for the interlock is Off
(Interlock_State bit variable = Off).
Syntax
Clear_Interlock()
Parameters None.
Returns
0 – Interlock not cleared.
1 – Interlock successfully cleared.
Error Codes None.
Example
Clear_Interlock()
This will disengage the system interlock.
Rev. D
7 — VCL
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Inputs: Interlock.To view the
»
Controller: Main State.
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Inputs:
107