Parameters Of The Analog Output Function Block - Samson 3787 Mounting And Operating Instructions

Parameters of the Analog Output Function Block

ALERT_KEY
Index: 4
Access: r, w
Input:
Default:
BKCAL_OUT
Index: 25
Access: r
BLOCK_ALM
Index: 30
Access: r, w
BLOCK_ERR
Index: 6
Access: r
Display:
CAS_IN
Index: 17
Access: r, w
CHANNEL
Index: 22
Access: r, w in O/S
Default:
FSTATE_TIME
Index: 23
Access: r, w
Default:
S The identification number of the plant unit. This information may be used in the
fieldbus host system for sorting alarms and events.
1...255
0
Note: The value 0 (default) is not a tolerated value and is therefore rejected with an
error message when writing to the device.
D Shows the analog output value and status which is passed on to BKCAL_IN of the
upstream function block with a cascade control. This value prevents reset windup and
provides bumpless transfer to closed loop control.
D Shows the current block status with information about existing configuration,
hardware or system errors including data about when the alarm was generated (date
and time) due to an error occurring.
Note: Additionally, the active block alarm can be manually acknowledged in this
parameter group.
D Shows the active block error.
OUT OF SERVICE
CONFIGURATION_ERROR
INPUT FAILURE
OUTPUT FAILURE
N Shows/determines the analog reference variable and its status taken over from an
upstream connected function block.
S Assignment among the output of each Analog Output Function Block and the logical
hardware channels (Transducer Block).
1
Note: CHANNEL must be set to a valid value before the AO Function Block can be put
into operation. This value must be set to "1" as there is only one Transducer Block
(Standard Advanced Positioner Valve) available in the Type 3787.
S The time in seconds from detection of a fault of the valid set point for the AO Function
Block in the current mode until the fault state is activated. If the fault still exists after this
time interval has elapsed, the fault state is activated.
0
Note: The fault state of the AO Function Block is determined in IO_OPTS of this block.
The block mode is O/S.
PV (position feedback) has BAD status, e.g. because
the Transducer Block is in O/S mode.
Correction value OUT cannot be issued, e.g. because
the Transducer Block is not initialized or is in LO mode.
Parameter description
59
EB 8383-1 EN