Network logic variables, Network logic variables -20, 9 network logic variables – Tyco F3200 User Manual
Page 230
F3200 Installation & Programming Manual
Document No: LT0122
Network Programming
Page 11-20
5 July 2001
Issue 2.7
11.9
NETWORK LOGIC VARIABLES
Network Variables can be used to transfer output logic status between panels for
applications such as:
(i)
Fan controls.
(ii)
Remote zone mimics.
(iii)
Transfer of zone alarm status between panels.
(iv)
Transfer of alarm status to a common Evacuation Panel interface.
(v)
Transfer of brigade relay status for multiple brigade interfaces at one panel.
An F3200 is always able to modify and use it's own network variables - this gives an extra
128 Variables for use, but they should be used sparingly as processing of network variables
takes longer than ordinary output logic variables.
The local F3200 will only send it's own Network variables onto the network if 'TX enabled' is
set to Yes. The transmit rate is programmed by "TX refresh rate". If a change of state
occurs, the network variables will be transmitted immediately providing the minimum time
specified by Max COS TX rate has elapsed since the last transmission.
The "Max COS TX rate" should be less than the "TX refresh rate". Both times should be set
so that an F3200 does not clog up the network with messages. The "Max COS rate" should
be set to the longest time possible, taking into consideration the configuration of the panel.
In general, the default settings should be adequate.
1. TX enabled : (Yes/No)
Enable sending of network logic variables onto the network.
2. TX refresh rate : (0-255 seconds)
Transmit refresh rate for network logic variables. A value of 255 for the TX refresh rate will
result in the Netvar data being refreshed at the same rate as MAF status refresh (Section
11.5.1), and the Netvar message will be transmitted in a single burst at the same time as
MAF status and MAF totals messages. This also requires the "Mode B" parameter to be set
to 3 (refer network configuration programming Section 11.3.4).
3. Max COS TX rate : (0-250 seconds)
Max rate on COS to transmit network logic variables.