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ROC800-Series Instruction Manual

6-2

Inputs and Outputs

Revised Jul-14

When you are done troubleshooting, perform the restart procedure as

described in

Restarting the ROC800

in this chapter.

6.2 Checklists

If the LEDs do not display:

By default, LEDs on the communication modules and I/O modules

enter Sleep mode after five minutes.

To turn the LEDs on, press the LED button located on the CPU for

one second.

Note

:

Using the ROCKLINK 800 software, you can disable this feature

so that the LEDs always remain on.

6.2.1 Serial Communications

If you are experiencing troubles with a serial communications connection

(LOI, EIA-232, EIA-422, or EIA-485):

Check to make sure power is applied to the ROC800 unit. Check the

position of the J3 jumper on the CPU board (see

Figure 2-8

in

Chapter 2

), the wiring connections at CHG+ and CHG– (for the PM-

12 module), and the wiring at the power source.

Note

:

On a Series 1 CPU, check the position of the

J4

jumper.

Check the wiring to the termination block or connector. Refer to

Chapter 5, Communications

.

Check the communication port settings using ROCLINK 800

Configuration software. Refer to the

ROCLINK 800 Configuration

Software User Manual (for ROC800-Series)

(Part Number

D301250X012) or the

ROCLINK 800 Configuration Software User

Manual (for ROC800L)

(Part Number D301246X012).

Restore to

Factory Defaults

To restore the COM ports to

factory defaults

(as they were delivered

to you from the factory) use this procedure:

Caution

This procedure, valid on the ROC800 (at firmware version 3.1 or higher)

and the ROC800L (at firmware version 1.00 or higher) also stops any

FSTs, User C programs, and DS800 programs.

1.

Press and hold the RESET button on the powered CPU for 5 to 10

seconds. The Status LED flashes when the process completes.

Note:

Use a small screwdriver or a straightened paper clip to press the

RESET button.

2.

Release the RESET button.

3.

Reconfigure your COM ports.