User manual

Publication 1738-SG001B-EN-P

ArmorPoint I/O

With the introduction of the 1738-232ASCM12 module, the amount of data to be

transferred over the Subnet could become substantial. This could also occur with the

1738-ADNX and the standard DeviceNet devices connected to its Subnet connector. It is

important that the total amount of data coming from the Subnet does not exceed the data

capability of either the 1738-ADN12, -ADN18, -ADN18P, or -ADNX.

y 250 bytes (248 data + 2 bytes command info) for output data (used as either COS,

cyclic, or poll)

y 250 bytes (248 data + 2 bytes status info) for polled input data

y 250 bytes (248 data + 2 bytes status info) for COS/cyclic input data

y 8 bytes (6 data + 2 status info) for strobe input data

The data coming through the 1738 adapter combined with the other data from the Main

Network cannot exceed the data capability of the Main Network master scanner. If this

occurs, you will need multiple master scanners on the Main Network and the I/O modules

on the Subnet will need to be split between multiple 1738-ADN12, -ADN18, -ADN18P, or

-ADNX adapters.