Tcs Basys Master; Overview; Basys Service Objects; Read-Only Monitoring Variables - ICC XLTR-1000 Instruction Manual

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9.4 TCS Basys Master

The gateway supports the TCS Basys master driver on both of its RS-485 ports,
and supports access to all parameter types and extensions.

9.4.1 Overview

Some notes of interest are:
• Requests are fully configurable through service objects.
• Holiday Scheduling parameter position encoding is fully supported.
• The gateway supports extended commands for TCS and non-TCS devices.
• Flexible data scaling through the use of a multiplier and offset allows data to
be scaled to any range.

9.4.2 Basys Service Objects

The TCS Basys ASD master driver uses service objects to describe what
services the gateway should perform. For each service object, the gateway will
continually read the parameters defined within the service object from the
designated device, storing the value(s) in the database (if the read function is
enabled). When data in the database changes where the parameters are
mapped, a write request is generated to the designated device notifying it of the
changed parameter value(s) (if the write function is enabled). For more
information on configuring Basys service objects, refer to section 8.6.5.2.

9.4.3 Read-Only Monitoring Variables

Parameters "K", "L", and "M" are read-only monitoring variables. The write
function must be disabled when these parameters are selected.

9.4.4 Holiday Scheduling Parameters

The positions for parameter "H" are encoded differently than other parameters.
For month, date, and days for both holiday sets (positions 0 – 5), the four-byte
position is divided into the upper two bytes and lower two bytes. The upper two
bytes give the holiday index (from 1 – 12). The lower two bytes give the position
value. Also, note that this command does not support reading multiple positions.

9.4.5 Parameter Scaling

Parameter values can be scaled using a multiplier and offset. These values can
be calculated given the raw data value range and the desired range by using the
following equations, where Max and Min are the raw data values and SMax and
SMin are the desired values:
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