Rockwell Automation 1734-APB Point I/O Profibus Adapter Module - Manual (Page 44)

Publication 1734-UM005B-EN-P - June 2001
4-6 Communication and I/O Table Mapping
Check_Configuration
After the set_parameter service, the master sends a
check_configuration service to the adapter. This service causes the
adapter to check its default configuration (determined at powerup),
against the actual configuration specified in the master configuration.
If the actual configuration does not match the default configuration,
the master will respond to the Check_configuration service with a
negative acknowledgement, which causes the master to set the
Configuration fault bit in the Slave_diagnostic service.
Note: Data exchange is not possible as long as the actual
configuration does not match the default configuration.
The POINT I/O PROFIBUS adapter is a modular slave, which means
that the size of the I/O block is flexible and not tied to a specific block
length. Each I/O module is represented by an identifier byte. This
byte defines the input- and/or output data length as well as the data
consistency of the I/O data.
The identifier bytes for all POINT I/O modules are contained in the
GSD file and are automatically extracted by the configuration tool
when you add the modules to your configuration.
The identifier byte is described below. More information is contained
in the PROFIBUS-DP standard (DIN 19245-3).
21 66h 1734-OE2C Configuration Data byte 3
22 1Fh 1734-OE2C Configuration Data byte 4
23 FFh 1734-OE2C Configuration Data byte 5
24 00h 1734-OE2C Configuration Data byte 6
25 00h 1734-OE2C Configuration Data byte 7
26 00h 1734-OE2C Configuration Data byte 8
27 00h 1734-OE2C Configuration Data byte 9
Octet Value Description
Bit 0 Bit 7
Length of Data
0 = 1 byte/word
15 = 16 bytes/words
0 = Consistency of byte/word
1 = Consistency of entire length
0 = Byte
1 = Word
Input/Output
00 = Special Format
01 = Input
10 = Output
11 = Input and Output