Configuring Dpv1 Read/Write Messages (Project View) - Honeywell Experion PKS User Manual

When the DPV1PRIORITY parameter is set as "On Demand," the DPV1 requests are polled only when the
DPV1ONDEMANDSCAN parameter is selected.
When the DPV1PRIORITY parameter is set as "No Poll," the corresponding DPV1 request is not polled.

7.2.1 Configuring DPV1 read/write messages (Project view)

Prerequisites
DSB block must be configured.
To configure DPV1 read/write messages (Project view)
Double-click the DSB block.
1
The DSB block configuration form appears.
2 Click the DPV1 tab.
3 Under Settings, select the Number of High Priority Requests (DPV1NUMHIGHPRIREQ) as required.
This parameter indicates the number of times a high priority request is serviced before servicing a low
priority request.
Under Configuration, type the total number of DPV1 requests to be configured in the Number Of
4
Requests (DPV1NUMPOLL) box.
The rows are added in the DPV1 Requests table.
Under the DPV1 Requests, configure the following parameters.
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a In the DPV1 Type (DPV1REQTYPE) list, select the DPV1 type as "DPV1 Read" or "DPV1 Write" for
each DPV1 request.
b In the Scan Priority (DPV1PRIORITY) list, select the scan priority as "No Poll" or "On Demand" or
Low" or "High" for each DPV1 request based on your requirement.
The Scan Priority (DPV1PRIORITY) configuration options are applicable only for the DPV1 read
records.
Under the Scan Options, select the Scan On-Demand (DPV1ONDEMANDSCAN) check box only
c
when the DPV1PRIORITY parameter is set as "On Demand."
When the DPV1ONDEMANDSCAN check box is selected, the DPV1 requests that are configured as
"Low," "High," and "On Demand," are scanned one time. The DPV1ONDEMANDSCAN check box is
cleared after scanning all the DPV1 records.
d In the Slot Number (DPV1SLOTNUM) column, configure slot number based on the PROFIBUS slave
device manual.
e In the Index (DPV1INDEX) box, type the index value for each DPV1 request to be read/written based
on the PROFIBUS slave device manual.
f In the Length (DPV1LENGTH) box, type the number of bytes to be read/written from the configured
the slot and index.
g In the Number Of Data Records (DPV1NUMOFDATARECORDS) box, type the number of data
records as required.
Click OK.
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The number of data records is saved.
Double-click the DSB block.
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The DSB block configuration form appears.
8 Click the DPV1 tab.
Attention
The Scan On-Demand (DPV1ONDEMANDSCAN) check box is available for configuration only in the
Monitoring view.
7 DEVICE SUPPORT BLOCK (DSB)
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