OMRON C200H-AD003 PLC

OMRON C200H-AD003 PLC

CPU indicators provide visual information on the general operation of the PC.

Although not substitutes for proper error programming using the flags and other

error indicators provided in the data areas of memory, these indicators provide

ready confirmation of proper operation.

CPU indicators are shown below and are described in the following table.

Indicator

Function

Lights when power is supplied to the CPU.

POWER

RUN Lights when the CPU is operating normally.

ALARM/ERROR

ALARM: Flashes when a non-fatal error is discovered in error

diagnosis operations. PC operation will continue.

ERROR:Lights when a fatal error is discovered in error diagnosis

operations. When this indicator lights, the RUN indicator will go

off, CPU operation will be stopped, and all outputs from the PC

will be turned OFF.

OUT INHIBIT

Lights when the Output OFF Bit, SR 25215. is turned ON. All

outputs from the PC will be turned OFF.

PC Configuration

CPU Racks

Expansion I/O Racks

Section 2-2

CPU indicators provide visual information on the general operation of the PC.

Although not substitutes for proper error programming using the flags and other

error indicators provided in the data areas of memory, these indicators provide

ready confirmation of proper operation.

CPU indicators are shown below and are described in the following table.

Indicator

Function

Lights when power is supplied to the CPU.

POWER

RUN Lights when the CPU is operating normally.

ALARM/ERROR

ALARM: Flashes when a non-fatal error is discovered in error

diagnosis operations. PC operation will continue.

ERROR:Lights when a fatal error is discovered in error diagnosis

operations. When this indicator lights, the RUN indicator will go

off, CPU operation will be stopped, and all outputs from the PC

will be turned OFF.

OUT INHIBIT

Lights when the Output OFF Bit, SR 25215. is turned ON. All

outputs from the PC will be turned OFF.

RUN

ALARM/ERROR

POWER

OUT INHIBIT

The basic PC configuration consists of two types of Rack: a CPU Rack and Ex

pansion I/O Racks. The Expansion I/O Racks are not a required part of the basic

system. They are used to increase the number of I/O points. An illustration of

these Racks is provided in 3-3 IR Area. A third type of Rack, called a Slave Rack,

can be used when the PC is provided with a Remote I/O System.

A C200H CPU Rack consists of four components: (1) The CPU Backplane, to

which the CPU and other Units are mounted. (2) The CPU, which executes the

program and controls the PC. (3) Other Units, such as I/O Units, Special I/O

Units, and Link Units, which provide the physical I/O terminals corresponding to

I/O points.

A C200H CPU Rack can be used alone or it can be connected to other Racks to

provide additional I/O points. The CPU Rack provides three, five, or eight slots to

which these other Units can be mounted depending on the backplane used.

An Expansion I/O Rack can be thought of as an extension of the PC because it

provides additional slots to which other Units can be mounted. It is built onto an

Expansion I/O Backplane to which a Power Supply and up to eight other Units

are mounted.

An Expansion I/O Rack is always connected to the CPU via the connectors on

the Backplanes, allowing communication between the two Racks. Up to two Ex

pansion I/O Racks can be connected in series to the CPU Rack.

Only I/O Units and Special I/O Units can be mounted to Slave Racks. All I/O

Units, Special I/O Units, Group-2 High-density I/O Units, Remote I/O Master

Units, PC and Host Link Units, can be mounted to any slot on all other Racks,

although mounting to the two rightmost slots on the CPU Rack may interfere with

the mounting of peripheral devices. With the CPU31-E CPU Unit, SYSMAC

LINK and SYSMAC NET Link Units can be mounted to the two rightmost slots on

the CPU Rack.

Refer to the C200H Installation Guide for details about which slots can be used

for which Units and other details about PC configuration. The way in which I/O

points on Units are allocated in memory is described in 3-3 IR Area