ProSoft Technology ILX69-PBM - Manual (Page 68)

Contents ILX69-PBM ♦ CompactLogix or MicroLogix Platform
User Manual PROFIBUS Master Communication Module
Page 68 of 124 ProSoft Technology, Inc.
February 4, 2015
HSR – Handshake Request Bits
Bit
Offset Data
Type Structure
Member Description
0 BOOL HsReq0 Slave Diag Request
1 BOOL HsReq1 Global Control Request
2 BOOL HsReq2 Reserved, set to 0
3 BOOL HsReq3 Reserved, set to 0
4 BOOL HsReq4 Reserved, set to 0
5 BOOL HsReq5 Reserved, set to 0
6 BOOL HsReq6 Reserved, set to 0
7 BOOL HsReq7 Reserved, set to 0
Using the handshake request bits, the user application can trigger different functions
supported by the ILX69-PBM. Every handshake request bit (HsReq) has a corresponding
handshake acknowledge bit (HsAck). It is located in the Device Status Register in the input
array (see section Device Status Registers (page 65)).
If the module sets an HsReq bit unequal to the corresponding HsAck bit, the module will
execute the command. If the module sets the corresponding HsAck bit equal to the HsReq
bit, then the module has executed the command and the application can execute another
command.
Note: The user application can only initiate a new command as long as the
HsReq and the HsAck bits are equal.
HsReq0 – Handshake Request 0
The user program can use this bit to execute a Slave Diagnostics request. This bit is to be
used with the SlvDiagCnf bit in the Handshake Acknowledge bits to determine if the
command has been processed. See the section on Device Status Registers for more
details.
HsReq1 – Handshake Request 1
The user program can use this bit to execute a Global Control command. This bit is to be
used with the GlbCtrCnf bit to determine if the command has been processed. See the
section on Device Status Registers for more details.
HsReq2...7 – Handshake Request 2 … 7
Reserved for future use.