Rockwell Automation 1794-APBDPV1 FLEX I/O PROFIBUS Adapter User Manual - Manual (Page 93)

Publication 1794-UM064B-EN-P - May 2014
Configure the Adapter for Master/Slave Communication 81
• auto configure
• reset outputs to zero on fault
• reset inputs to zero on fault
The reserved bits must be set to zero to prevent undesired firmware update
behavior. This is the default behavior of the module as defined in the GSD file.
The descriptions in this chapter use the following example FLEX I/O
configuration to explain the information required for each of these functions:
1794-APBDPV1 Adapter Slave
Auto Configure Format
The Auto Configure format allows you to change modules without affecting the
User Parameter or Check Configuration data. This format provides no keying
from the master on the I/O modules installed in the FLEX I/O system. The
installed module at power-up is taken as the key.
If you change a module while it is being controlled by a master, a recoverable fault
occurs. To recover from this fault, you must replace the module with an identical
module type.
The complete I/O module real time data table without the module ID, but with
the module configuration, is transferred via cyclic PROFIBUS data in one block.
Condensed Format
The condensed format consists of the flags byte and the module key parameter
for each of the eight slots. This parameter dictates which I/O module must be
installed. If at any time the actual module ID does not match this module key, the
slot will be considered in fault and the following occurs:
• Status Indicator flashes red/off
User Parameter Example
User Parameter Message, Auto Configure Format (Length 1 byte)
Name Value Description
Octet 8: 00h Auto Configure Format, Reset to Zero on Fault
1794-APBDPV1 Adapter Slave
FLEX I/O System
1159