GE Security ZP3, Инструкция по установке и обслуживанию

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ZP3 Fire Control Panel Installation, Commissioning and Maintenance Manual
REV 11 (ISS 08/03/2010) Page 121
Interpretation of analogue readings
Introduction
The panel reads six analogue values from each device, each time it polls that device. Each value
is a whole number that can range from 0 to 255. These values can be interpreted in order to
provide a comprehensive analysis of each device and the system as a whole.
The six readings are listed below in the order in which they are read and conventionally displayed:

Reading 1 Reference group

Reading 2 Polling group

Reading 3 Device type

Reading 4 Reference (low)

Reading 5 Device status (device analogue reading)

Reading 6 Device specific
The following sections give the meanings of each analogue reading. Reading 6 is only relevant for
certain specialized devices, and is usually zero.
Reference group
The reference group reading identifies the device reference group type. This value is used for the
following:

Decide if a device is 'online' (connected) or 'offline' (disconnected).

Determine the health of a device and how well the device or the Line Driver Board is
calibrated.

To identify if the device is an intrinsically safe (EX), ZR, ZP or ZX device.
The values are interpreted as follows (as for Table 26 on page 93):
0–39
A value in this range indicates to the panel that there is no device at the polled
address. It is offline.
70-100 Values in this range indicate an intrinsically safe (EX) device. The norm for
intrinsically safe devices is 84, which indicates best calibration.
135–163 The norm for ZR and ZX devices is 152.
197-226 Values in this range indicate a healthy non-intrinsically safe device (ZP). The norm
for devices is 213, which indicates best calibration. If a device falls outside the
range 205-218 then it should be re-calibrated.
All others Values falling outside the above ranges indicate a very poorly calibrated or
unhealthy device. The panel treats all such devices as invalid. If occurring on
multiple devices, a wiring fault may be suspected.
Device type readings
Readings two (polling group) and three (device type) together with reading one (reference group)
identify the type of the device. The device types indicated by combinations of the three readings
are provided in Table 32.
The "Code" column gives a three-digit identifier for the device, each digit derived from the values
of the device type readings. Some intrinsically safe devices may have the same code as standard
devices but are distinguished by their reference group reading (Reading 1).