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3.3.3
Software Downloading
While powering on the RTU press and hold down the pushbutton. This should cause the
CPU LED Display (upper left corner) to flash on / off indicating that the CPU has entered
into its bootstrap mode. Now it is possible to download a system file into the CPU Flash.
Connect a PC to the CPU Port 2 for downloading.
If after approximately 120 seconds no bootstrap software is loaded and executed the
normal power-up procedure is performed or an error message is displayed on the PC.
3.3.4
Connectors
The CPU ports are designed for the following uses:
PORT 1A – Data Port (RS-485)
PORT 1B – Data Port (RS-232)
PORT 2
– Data Port (RS-232)
PORT 3
– Data Port (RS-232, Radio, or Line Connection)
N
o
t
e
:
N
o
t
e
:
Ports 2 and 3 can operate simultaneously with each other and with
either Port 1A or Port 1B.
Ports 1A and 1B cannot work simultaneously.
3.3.5
CPU Module Field Replaceable Parts
Table 3-3 CPU Module Field Replaceable Parts
Part No.
Description
FLN2722
CPU Module
FRN5811
Display Board
FHN6106
CPU Hardware Kit
3-8
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