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Rockwell Automation 198x Modular DeviceNet Starter Auxiliary I/O User Manual

Page 48

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Publication 198-UM001B-EN-P September 2001

Each I/O module contains 4 bits (one nibble) of data. The data is packed into two modules
to a single byte of data. The Input instance (produced data) contains five bytes of status and
fault information followed by the input data for each module containing inputs. The Output
instance (consumed data) contains the output data for each module containing outputs.

The device can produce data when one of its inputs changes state. This is how the device
produces data when a Change of State (COS) connection is allocated. The device also
produces data in response to an I/O message from its master. This how the device produces
data when a Polled I/O connection is allocated. Following is an example of how the I/O
messages are formatted for the lineup shown.

Figure 3.2 Lineup

X = Reserved

IMPORTANT

The size of the I/O produced data and I/O consumed data can be read
from the parameters located in the Configuration Group of the
Device Parameter tab.

Cat. No.

198-DNG

Cat. No.

198-OW2

Cat. No.

198-IB4

Cat. Nos.

198-IA2X,

198-OW1

Cat. Nos.

198-IB2X,

198-OB1

Cat. Nos.

198-IA2

Cat. No.

198-IB2S

Mod 0

Mod 1

Mod 2

Mod 3

Mod 4

Mod 5

Mod 6

Mod/Net

Out 1

In 1

In 1

In 1

In 1

In 1

I/O

Out 2

In 2

In 2

In 2

In 2

In 2

In 3

Out 1

Out 1

In 4

Table 3.F I/O Module Data

Module

I/O

Bit

Bit 1

Bit 2

Bit 0

2 Output Module

Output

X

X

Out 2

Out 1

4 DC Input Module

Input

In 4

In 3

In 2

In 1

AC Starter Module

Input

X

X

In 2

In 1

Output

X

X

X

Out 1

DC Starter Module

Input

X

X

In 2

In 1

Output

X

X

X

Out 1

2 AC Input

Input

X

X

In 2

In 1

1 AC Input

Input

X

X

X

In 1

Sensor Module

Input

Open

Short

In 2

In 1