Revision 1.1
GM ECx Instruction Manual
21
CLOCK/DELAY SETUP
Time 12:35:42
Date 04/22/04
Warm Up Sec 120
Cal Purge Sec 100
Figure 6-6: Clock & Calendar / Delay Timer Menu
6.7 COMMUNICATIONS
SETUP:
The
Communications
menu provides access to
RADIO SETUP
menus described below.
Hop
Channel
and
System ID
settings must match these settings in the Server.
Remote ID
must be
unique to each GM ECx.
Figure 6-7: RF900 Modbus Setup Menu
•
Hop Channel
may be set from 1-32 and assigns the pseudo-random radio frequency
hopping pattern. A transceiver will not go In Range of or communicate with a transceiver
operating on a different Hop Channel. Different hop channels can be used to prevent
radios in one network from listening to transmissions of another. Installations having
more than one Server network should also have different hop channels for each network.
•
Remote ID
may be set from 1-255 and acts as the “RTU” address for this particular GM
ECx. Controller channels receiving this monitor’s data must also be configured with this
matching Remote ID address.
•
System ID
may be set from 1-255 and is similar to a password character or network
number and makes network eavesdropping more difficult. A transceiver will not go In
Range of or communicate with a transceiver operating on a different System ID.
•
TX Power
may be set for 10 mW, 200mW, 400mW and 1 watt. Since GM ECx monitors
are battery powered the TX Power setting should be as low as possible to sustain reliable
communication. The maximum TX Power setting is 30db (1 watt) and each time TX
power is reduced by half, antenna transmit power is reduced by 3dB.
•
TX Verbose
should be set to
NO
for normal operation. YES entries cause the GM ECx
to transmit additional information which is currently not processed by C1 and C2
controllers.
•
Radio Status
opens another screen that shows if the GM ECx is In Range of the Server
and what the battery power supply voltage is. Battery voltage is also displayed on the
“EC INPUT PG. 2” screen shown in Figure 6-2.