In no event is Honeywell liable to anyone for any direct, special, or consequential damages. The information and specifications in this document are subject to change without notice.
Detecting Open Wire - SVP-AI Channel blocks
The open wire diagnostic detects and annunciates broken field wires. In addition, a seemingly valid
PV from a channel diagnosed as having a broken-wire is not made available (thus preventing
incorrect control action).
If open wire detection is enabled (OWDENBL = ON) and the IOM detects the broken-wire condition,
then
l Soft Failure 179 'Open Wire Detected' is generated, and
l PVRAW and PVAUTO is consequently set to NaN.
10.23.7 Checking and Filtering PV Range - SVP-AI Channel blocks
PV range checking ensures that the PVCALC output of PV characterization is within the limits
defined by parameters PVEXEULO and PVEXEUHI. If either of the limits is violated, the output of
the PVAUTO is set to NaN if clamping has not been specified. If clamping has been specified, the
output of the PVAUTO is clamped to PVEXEUHI or PVEXEULO, except when PVRAW, PVCALC, and
PVAUTO is consequently set to NaN.
If the range-checked and filtered value is less than the value specified by the user-configured
LOCUTOFF parameter, the final output called PVAUTO is forced to PVEULO.
First-order filtering is performed on PVCALC, as specified by the user through parameter TF (filter
lag time).
10.23.8 Configuring the SVP_AI channel for angular measurement
using Resolver
With R410, SVP_AI channel can be configured to perform angular measurement using the
Resolver.
Perform the following steps in the SVP_AI channel's configuration form to measure the angle
using the Resolver.
1. In the Type Information section of the Configuration tab, configure the SENSRTYP parameter
as 'Resolver.'
2. On the Position Configuration tab, verify the following steps.
a. Ensure that the XMTRWIRESLCT parameter is set as '6_WIRE.'
b. Ensure that the VDTMODE parameter is set as 'ARCTAN(A/B).'
