Comau C3G Plus, Operation And Maintenance Manual, Page: 242 / 266

C3G-RPT RESOLVER POSITION TRACKER (When installed)
Intelligent module on board machine which makes the machine itself absolute with regard to the control unit.
The RPT module (patented device) based on a microprocessor system with rechargeable backup battery which allows it to work without
external power for a maximum of 600 hours, counts the number of motor revolutions for eight machine axes. It also contains character-
istic information about the machine with which it is associated and allows identification by the control unit.
The RPT module is a Control Unit slave unit (SCC2 module). Via serial line EIA RS485 it is connected to the Servo Control CPU module
(SCC2) and it is in multidrop with the Servo Amplifiers Unit 2. It is connected to the control unit, from which it can be remoted up to 40
metres, on the services cable on which the external supply (24 Vdc) and the serial line pass; it shares the machine axes resolver signals
with the control unit (SCC2).
It receives commands and sends status messages and the motor revolution count (position) of the machine axes via serial line EIA
RS485 of the SCC2 module.
Constructively, the RPT module is made on two boards: RPT MAIN and RPT ANNEX which are interlinked.
SWITCH SW1 CONFIGURATION
Switch SW1 configuration (on RPT ANNEX board)
1 2 3 4 Description
ON ON x
N
O
T
U
S
E
D
1200 baud
OFF ON x 2400 baud
ON OFF x 4800 baud
OFF OFF x 9600 baud
x x ON RPT n° 1
x x OFF RPT n° 2
Switch SW1 configuration (on RPT MAIN board)
1 2 3 4
Description
Tx Rx
ON ON x x Closing of transmission serial line termination
OFF OFF x x Opening of transmission serial line termination
x x ON ON Closing of reception serial line termination
x x OFF OFF Opening of reception serial line termination
Configuration E1
(on RPT MAIN board)
Jumper on pin Description
1 - 2 RPT on
2 - 3 RPT off
MAINTENANCE C3G
Plus
7-52 04/0799
On the RPT module the serial line can be terminated by suitably configuring the dip
switch SW1, on the RPT MAIN board; the normal operating condition is with all the
switches in the OFF position.
The switches are used in the ON position only in particular conditions that are hardly
ever to be found in reality. It is possible to cut off the RPT module from the control
circuit and store the axes position through a jumper E1, on the RPT MAIN board:
LAYOUT
C3G-RPT
(WHEN
INSTALLED)
RPT LED
When the led on the RPT module is on, it in-
dicates the presence of the +24 Vdc module
power supply.