ProSoft Technology PS69-DPM - Manual (Page 70)

Contents PS69-DPM ♦ CompactLogix or MicroLogix Platform
User Manual PROFIBUS DPV1 Master
Page 70 of 130 ProSoft Technology, Inc.
October 1, 2014
RST := Reset
The user program can use this bit to execute a Reset (Cold Start) of the module.
Attention: Using the Reset command will cause an interruption in bus communication. All connected slaves go
to fail safe mode.
HSR := Handshake Request Bits
Bit Offset Structure Member Data Type Description
0 HsReq0 BOOL SlvDiagReq, Slave Diag Request
1 HsReq1 BOOL GlbCtrReq, Global Control Request
2 HsReq2 BOOL Reserved
3 HsReq3 BOOL Reserved
4 HsReq4 BOOL Reserved
5 HsReq5 BOOL Reserved
6 HsReq6 BOOL Reserved
7 HsReq7 BOOL Reserved
With the handshake request bits the user application can trigger different functions
supported by the master module. Every handshake request bit (HsReq) has a
corresponding handshake acknowledge bit (HsAck) in the Device Status Register in
theDevice Status Registers (page 61). If the module set 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 bit and the HsAck bit are
equal.
HsReq0 := Slave Diag Request
The user program can use this bit to execute a Slave Diagnostic request. This bit is used
with the SlvDiagCnf bit in the Handshake Acknowledge bits to determine if the command
has been processed. Refer to Device Status Registers for more Input:
DPM_DEV_STATUS_REGISTER (page 110).
HsReq1 := Global Control Request
The user program can use this bit to execute a Global Control command. This bit is used
with the GlbCtrCnf bit to determine if the command has been processed. See section on
Device Status Registers for more Input: DPM_DEV_STATUS_REGISTER (page 110).
HsReq0..7 := Reserved
Reserved for future use.
Slave Diagnostic Request Register
The Slave Diagnostic Request register in combination with the handshake request bits is
used to provide the user program with an easy method to execute a diagnostic request to a
specified slave in the system.