[W_AG] Write analog group

EnWrit

Enable write

If [EnWrit] = 1, writing values from inputs [Val] and [SetValid] to the BACnet object is enabled.
If [EnWrit] changes from 0 to 1, writing occurs.

Boolean

1

Val

Value

Real

0.0

Virtual value, calculated and assigned by the control program to update the present value.

[Val] is used to update the property 'Tracking value'; followed by the BACnet object internally updating the present value with the written tracking value.

[Val] is written if [EnWrit] = 1 and one of the following items appears:

• [Val] changes with value
• Greater than or equal to [TshVal].
• Equal to the limit values 0.0 or 100.0 ([TshVal] is ignored).
• [SetValid] changes.
• [RptWrit] is 1.

SetValid

Set valid value indication

A value calculated and assigned by the control program that indicates whether [Val] is reliable.

[SetValid] is mapped to an error code that updates reliability if [EnWrit] = 1 and one of the following items applies:

• [SetValid] changes.
• [Val] changes.
• [RptWrit] is 1.

Boolean

1

0 - Reliability error code 7 (unreliable - other).
1 - Reliability error code 0 (no fault).

RptWrit

Repeat write

Forces writing of [Val], and [SetValid] to the data point. Write is repeated with each program cycle until [RptWrit] = 1.
The control program typically calculates and sets [RptWrit].

Note:
[RptWrit] cannot be permanently forced to 1. This may influence performance and communications traffic.

Boolean

0

0 - No action.
1 - [Val] and [Sta] are written to the data point with each programming cycle.

TshVal

Threshold value

Configured value to control function block write attempts. An attempt is only permitted if the change of value is greater than or equal to [TshVal].
Exception: [TshVal] is ignored if the new value is a limit value such as 0.0 or 100.0.

Note
Cannot be set to 0.0.

Real

0.1

WIvlMin

Minimum write interval

Minimum interval without writing on the BACnet object based on a change to [ValIn].
Minimum: 0s
Maximum: 1h
Note
[WIvlMin] does not influence the functionality of [EnWrit], [SetValid] or [RptWrit].

Time

0 ms

GrpTag

Grouping tag

Specifies the group data (present value, priority) for central distribution by the function block.
The system provides predefined and customizable tags. Typically, the application engineer sets [GrpTag] in the programming editor and it cannot be changed during runtime. A tag that matches the data type of the function block must be set.

Double Word

0

BaObjRef

BA-Object reference
Link between function block and BACnet object.

Structure

---

BaObjRef
> DeviceID

Device identifier
[DeviceID] includes object type and object instance in one ID.
Identifies the device object: local or remote. A local device object can also be identified by value 16#3FFFFF.

Double Word

16#3FFFFF

BaObjRef
> ObjectID

Object identifier
[ObjectID] includes object type and object instance in one ID.
Identifies the object on a device.

Double Word

16#3FFFFF

BaObjRef
> ItemID

Item identifier
[ItemID] represents an index in a view node object that references the BACnet object.
[ObjectID] and [ItemID] together define an indirect reference to the BACnet object.
Value -1 indicates a direct interface.

Integer

-1

Dstb

Disturbed

[Dstb] indicates whether the referenced BACnet object was accessed.
[Dstb] = 0, if:
BACnet object access = Access successful
[Dstb] = 1, if:
BACnet object access = Error during access

Boolean

0

ErrCode

Error code indication

Integer

0: No error

= 0 - No error
> 0 - XFB error codes