3G5A2-RPT01-PE datasheet(40/182 Pages) OMRON

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CPU Indicators

The following table describes the indicators on the front panel of the CPU.

Indicator

Operation

POWER (green)

Lights when power is supplied to the CPU.

RUN (green)

Lights when the PC is operating normally.

ERROR (red)

Lights when an error in the CPU causes operation to stop. When the ERROR indicator lights, the

RUN indicator will go out and all outputs from Output Units will be turned OFF.

WDT (red)

Lights when a CPU error (watchdog timer error) has been detected. When the WDT indicator

lights, the RUN indicator will go out and all outputs from Output Units will be turned OFF.

ALARM (red)

Lights when non-fatal error is detected.

OUTINH (orange)

Lights when the Output OFF Bit (A00015) is turned ON to turn OFF PC outputs.

COMM (orange)

Lit from when data is received from the host computer until the response is completed.

DIP Switch Settings

The DIP switch is used to set certain basic operational parameters for the CPU.

To gain access to the DIP switches, open the cover of the Memory Card com-

partment as shown in the following figure. Turn off power to the PC before setting

the DIP switch.

OFF

Function

Specifies whether the termination resistance is connected for the Host Link System. Turn this pin ON to

connect the terminal resistance. When RS-422 is used set this pin to ON at the last PC connected in the Host

Link System. When RS-232C is used, this pin does not affect Host Link System operation and may be set to

either ON or OFF.

To transfer the user program file (AUTOEXEC.OBJ) and the PC Setup (AUTOEXEC.STD) from the Memory

Card to the CPU on power application, set this pin to ON. If this pin is set to OFF, the PC Setup can be

changed from the CVSS so that only the user program (AUTOEXEC.OBJ) is transferred when power is

turned on. If program transfer is designated both with this pin setting and in the PC Setup, then both the

program file and the PC Setup will be transferred. The user program will not be transferred when the system

protect keyswitch on the front panel of the CPU is set to the SYSTEM PROTECT position, or memory is

write-protected from the CVSS.

Set this pin to the ON position to establish the following communications settings for the host link interface.

These are the most common setting for an IBM PC/AT interface.

Baud rate:

9,600 bps

Unit number: 0

Parity:

Even

Data length:

7 bits

Stop bits:

When this pin is OFF, the communications settings for the host link interface are set in the PC Setup. Refer to

the

CVSS Operation Manuals for details on the PC Setup.

Note: The above settings apply to CPUs manufactured from July 1995 (lot number **75 for July 1995). For

CPUs manufactured before July 1995 (lot number **65 for June 1995), only 1 stop bit will be set and the

baud rate will be 2,400 bps.

Rack Components

Section 2-3

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