IM 01E20F02-01E
5-7
5. EXPLANATION OF BASIC ITEMS
5.5 DI Function Block Parameters
DI Function block parameters can be read or set from
the host. Figure5.5.1 presents the diagram of DI
Function block.
FIELD_VAL_D
OUT_D
CHANNEL
PV_D
Alarms
DISC
Optional
Invert
Filter
PV_FTIME
Simulate
SIMULATE_D
MODE
Output
F0503.eps
Figure 5.5.1
Diagram of DI Function Block
ADMAG AXF contains two DI function blocks, which
individually transfer the "Flow switch" and "Adhesion
Alarm/warning" generated by the transducer block. For
a list of the parameters of blocks held by the ADMAG
AXF, refer to "List of parameters for each block of the
ADMAG AXF" in Chapter 8. The following is a list of
important parameters with a guide to how to set them.
MODE_BLK:
Indicates the three types of function block modes;
Out_Of_Service, Manual, and Auto. MODE_BLK
indicates what mode of operation is desired for DI
Function block. In Out_Of_Service mode, the DI block
does not operate. The Manual mode does not allow
values to be updated. The Auto mode permits the
measured value to be updated. Under normal circum-
stances, set the Auto mode to take effect. The Auto
mode is the factory default.
CHANNEL:
This is the parameter to specify the value of the
transducer block to be input to the DI block.
Value
Content
2
LIMSW_1
3
LIMSW_2
4
SWITCH_1
5
SWITCH_2
T0505.eps
Each DI block is assigned to either "Flow switch" or
"Adhesion Alarm/warning".
PV_FTIME:
Stipulates the delay time (in seconds) of changing the
output value after a change of the value inside the DI
block.
DISC_PRI:
Deternines the priority level of the discrete alarm on
the block's output (OUT_D). The alarm will be
transmitted upon occurrence only when the DISC_PRI
is set at 3 or higher. This parameter is set to 1 before
the AXF is shipped from the factory.
Table 5.5.1 Alarm Priority
Value
Value
Description
Description
0
Alert is not notified. Alarm parameters are not updated.
1
Alert is not notified.
3 to 7
Advisory alarms.
8 to 15
Critical alarms.
T0506.eps
DISC_LIM:
Setpoint of the discrete alarm; when the value of
OUT_D agrees with the value set in DISC_LIM, the
discrete alarm is generated.