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4101-2 Controller Installation Handbook

19-14

change the jumper settings, you must switch off the power

briefly and power up again to register the change.)

• Check that the rotary switch on the Comms module is set to F.

(If you change the switch setting, you must switch off the

power briefly and power up again to register the change.)

• If you have checked all the above and still cannot get the On

Line message in the Software, remove the power from the

Controller then power up again. If the upstream Tx LED

flashes but there is no activity on the upstream Rx LED (the

right hand LED of the left hand pair), the TXD and RXD

connections to the PC are probably the wrong way round.

Checking the RS485 Connections downstream from the

Comms module to the controllers

Note: These connections do not affect whether there is an On Line

message on the PC screen. It is advisable to check all the above first

if the PC shows Off Line.

Refer to the connection diagram in the chapter on the

Communications Module and check each connection carefully.

Points to check are:

• Check that there is not a mixture of Controllers and Comms

modules connected directly from the downstream connections

of the type F Comms module. (Exception to this rule: you are

allowed to mix Controllers and type E Comms modules either

for extending the length of the RS485 cable or for talking to a

modem.)

• Check that the Controllers are connected to CONN4 on the

Comms module (downstream - direction B - RS485) and not to

CONN1, CONN2 or CONN3.

• Check that the downstream (direction B) jumpers (JU3 and

JU4) on the Comms module are set to RS232, 9600 baud. (If

you change the jumper settings, you must switch off the power

briefly and power up again to register the change.)

• Check that the rotary switch on the Comms module is set to F.

(If you change the switch setting, you must switch off the

power briefly and power up again to register the change.)

• Check that the RS485 cable is connected to CONN2 on all the

Controller motherboards and not to CONN1. The Comms

module must be connected in parallel to all Controller

motherboards, including the one it’s plugged into. Plugging

the Comms module into the module slot does not connect

the comms.

Brand	BEWATOR COTAG
Model	4101-2
Category	Controller
Language	English

BEWATOR COTAG 4101-2 User Manual

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BEWATOR COTAG 4101-2 Specifications