CC-PFB401 51405044-175 Honeywell Central control module Brand new

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).'