Discrete Control Condition function block parameters

None

None

When AbortOnReadErrors is selected, the expression algorithm aborts after a read error. When the expression aborts, the value and status of F_OUT_D_n, F_PRE_OUT_Dn, I_OUT_D_n, I_PRE_OUT_Dn, P_OUT_D_n, and P_PRE_OUT_Dn remain unchanged.

None

When this parameter is non-zero the first out trap mechanism for interlocks is enabled.

None

None

The set of active user-selected error conditions that triggers a Bad block status. Select block error (BLOCK_ERR) conditions in the BAD_MASK parameter. When any of these conditions are True, the BAD_ACTIVE parameter becomes True. When any of the BLOCK_ERR conditions that are not included in BAD_MASK are True, ABNORM_ACTIVE becomes True.

None

None

Indicates the command from the downstream EDC block, including the passive state information. Use CMD_IN_D to latch the interlock condition and trap the first interlock condition and to reset the first interlock indication.

None

The output value that represents the logical OR of I_DISABLE_ACT, P_DISABLE_ACT, and F_DISABLE_ACT.

Seconds

This parameter is the configured time (in seconds) before F_PRE_OUT_Dn becomes True after the force setpoint condition n is True. If the force setpoint condition n clears before the delay time is reached, F_PRE_OUT_Dn eter remains False and the timer resets. Every time the force setpoint condition n clears, the timer resets.

None

User-specified description of the force setpoint conditions.

None

Enables/disables the force setpoint conditions (True = disable, False = enable).

None

The logical OR of the F_DISABLEn parameters.

None

Specifies how the block force setpoint logic behaves when a read error occurs. The value of F_PRE_OUT_Dn is False, True, or the last value prior to the read error as defined in F_ERROR_OPT (unless Abort on Read Errors is selected in ALGO_OPTS, in which case F_ERROR_OPT does not apply). The status of F_PRE_OUT_Dn is BadNoComm when a read error occurs.

None

The configurable expression n that when it evaluates True, the force setpoint condition is active.

None

The named state (F_STATEn) of the force setpoint condition (F_OUT_D_n = True) becoming active that has the smallest condition number of the force setpoint conditions becoming active.

F_OUT is updated only when a force setpoint condition becomes active. When there is no force setpoint condition active, F_OUT holds its last value.

When all force setpoints clear, F_OUT retains its last value.

None

The pulsed output value that represents the logical positive edge detection of the F_OUT_D_n parameters.

None

The internal value copied from F_PRE_OUT_Dn when force setpoint condition n is not disabled.

When force setpoint condition n is disabled, F_OUT_D_n is False.

None

The unsigned 32-bit binary weighted output value that represents the bit combination of the F_OUT_D_n parameters.

None

The internal value set when F_EXPn evaluates to True for a period longer than F_DELAY_ONn. F_PRE_OUT_Dn ignores the F_DISABLEn value.

None

Named state of condition n when this condition is True. The named state is the setpoint the condition is forced to when this parameter is True.

The named states from 0 to 5 correspond to the 6 setpoints of the Enhanced Device Control (EDC) block.

The named state 255 is interpreted by the EDC block as the setpoint defined as the Passive setpoint in the EDC block.

Seconds

The elapsed time since the force setpoint condition n transitioned to True.

F_TIMERn resets when F_PRE_OUT_Dn transitions to False.

None

The number of force setpoint conditions that are evaluated by the force setpoint logic.

F_USED_CND can take any value between 0 and and the number of force setpoint conditions configured (maximum of 8).

Seconds

This parameter sets the time (in seconds) befoe I_PRE_OUT_Dn becomes False after the interlock condition n clears. If the interlock condition n reoccurs before the delay time is reached, I_PRE_OUT_Dn remains True and the timer resets. Every time the interlock condition n is detected, the timer resets.

Seconds

This parameter sets the time (in seconds) before I_PRE_OUT_Dn becomes True after the interlock condition n is True. If the interlock condition n clears before the delay time is reached, I_PRE_OUT_Dn remains False and the timer resets. Every time the interlock condition n clears, the timer resets.

None

The I_DESC_n parameter of the first active interlock condition where I_L_OUT_Dn is True when the trap occurs .

None

User-specified description of the interlock conditions.

None

Enables/disables the interlock conditions (True = disable, False = enable).

None

The logical OR of the I_DISABLEn parameters.

None

Specifies how the block interlock logic behaves when a read error occurs. The block sets I_PRE_OUT_Dn to False, True, or the last value prior to the read error as defined in I_ERROR_OPT (unless Abort on Read Errors is set in ALGO_OPTS, in which case I_ERROR_OPT does not apply). The status of I_PRE_OUT_Dn is BadNoComm when a read error occurs.

None

When I_EXPn evaluates True, the interlock condition is active.

None

The bit value of the highest priority condition (lowest condition number) that is currently active. If another condition that has a different interlock state (I_STATEn) and a higher priority becomes active, I_FIRST_OUT changes to the bit value of the newly active condition.

When CMD_IN_D status is bad, the I_FIRST_OUT trap occurs immediately when the condition becomes True and ARM_TRAP is True.

None

Enables/disables the ability to disable an interlock condition. When True, I_DISABLEn has no effect on I_OUT_D_n.

None

The latched value of I_OUT_D_n when I_RESET_REQD_n is True and CMD_IN_D is different than I_OUT when CMD_IN_D status is not bad.

When I_RESET_REQD_n is False, I_L_OUT_Dn is a copy of I_OUT_D_n.

None

The named state equal to the I_STATEn parameter value associated with the active or latched interlock condition (I_OUT_D_n or I_L_OUT_Dn = True) having the smallest condition number.

I_OUT is Passive state (value 255) when I_OUT_INT is zero (all conditions clear).

None

The logical NOR of the I_OUT_D_n or I_L_OUT_Dn parameters.

None

The internal value copied from I_PRE_OUT_Dn when the interlock condition n is not disabled.

When the interlock condition n is disabled, I_OUT_D_n is False.

None

The unsigned 32-bit binary weighted output value that represents the bit combination of the I_OUT_D_n or I_L_OUT_Dn parameters.

None

The internal value set when the interlock expression evaluates to True for a period longer than I_DELAY_ONn. I_PRE_OUT_Dn ignores the I_DISABLEn value.

None

When True, it indicates that an active interlock condition no longer exists (all I_OUT_D_n are False), but that the block has to be reset to clear the interlock output (I_OUT_D = False).

I_RESET_REQD is False when there are no active or latched conditions.

None

Enables the latching of I_OUT_D_n when True.

When I_L_OUT_Dn is latched, a reset is required to unlatch it when I_OUT_D_n is False. A reset is required to prevent the I_OUT_D parameter to return to False without an action to acknowledge that an active interlock condition was present.

None

Named state associated with condition n that indicates the state to interlock when this condition is True.

The named states from 0 to 5 correspond to the 6 states of the EDC block.

The named state 255 is interpreted by the EDC block as the Passive State in the EDC.

Seconds

None

Indicates the number of interlock conditions which are evaluated by the interlock logic.

I_USED_CND can take any value between 0 and the number of interlock conditions configured.

Seconds

The time (in seconds) before P_PRE_OUT_Dn becomes False after permissive condition n clears. If permissive condition n reoccurs before the delay time is reached, P_PRE_OUT_Dn remains True and the timer resets. Every time the permissive condition n is detected, the timer resets.

Seconds

The time (in seconds) before P_PRE_OUT_Dn becomes True after permissive condition n is True. If permissive condition n clears before the delay time is reached, the P_PRE_OUT_Dn remains false and the timer resets. Every time the permissive condition n clears, the timer resets.

None

User-specified descriptions of the permissive conditions.

None

Enables/disables the permissive conditions (True = disable, False = enable).

None

The logical OR of the P_DISABLEn parameters.

None

Specifies how the block permissive logic behaves when a read error occurs. The value of P_PRE_OUT_Dn is False, True, or the last value prior to the read error as defined in P_ERROR_OPT (unless Abort on Read Errors is set in ALGO_OPTS, in which case P_ERROR_OPT does not apply). The status of P_PRE_OUT_Dn is BadNoComm when a read error occurs.

None

When the configurable expressionn evaluates True, the permissive condition is active.

None

The logical AND of I_OUT_D and the logical NOR of the P_OUT_D_n parameters.

None

The internal value copied from P_PRE_OUT_Dn when the permissive condition n is not disabled.

When the permissive condition n is disabled, P_OUT_D_n is False.

None

The unsigned 32-bit binary weighted output value that represents the bit combination of the P_OUT_D_n parameters.

None

The internal value set when the permissive expression evaluates to True for a period longer than P_DELAY_ONn. P_PRE_OUT_Dn ignores the P_DISABLEn value.

Seconds

None

The number of permissive conditions which are evaluated by the permissive logic.

P_USED_CND can take any value between 0 and the number of permissive conditions configured.

None

The block sets RESET_D back to zero at the end of each scan.

RESET_D does not re-arm the trap. I_FIRST_OUT remains cleared until the trap occurs again.

The unlatched I_L_OUT_Dn parameters remain False until one or more I_OUT_D_n parameters transitions to True and for which the I_RESET_REQD_n parameters are True.