ProSoft Technology PTQ-PDPMV1 User Manual
Page 211
PTQ-PDPMV1 ♦ Quantum Platform
Hot Standby Support
PROFIBUS DP Master Network Interface Module for Quantum
User Manual
ProSoft Technology, Inc.
Page 211 of 306
August 12, 2014
SAP number
SAP 10 is used for ping messages
SAP 11 is used for DPV1 status messages
No SAP is defined for slave status messages (FDL_Status)
The following table lists FDL services that are needed for the HSBY functionality.
The two right-hand columns indicate which services are used by the active and
remote (passive) Masters.
FDL Service
Description
Local
(Active)
Master
Remote
(Passive)
Master
Open-Channel
Establish a channel to the FDL-layer
X
X
SAP-Activate
Opens up a Service Access Point at the responder
X
X
IND-Resource-Provide
Makes a resource available for single SRD-requests
X
IND-Resource-Repeat-
Provide
Makes a resource available for SRD-repeat-requests
X
Reply-Update-Multiple
Updates the SRD-response data
X
FLC-Repeat-Exchange
Reads out the latest SRD-request data
X
SRD
Sends an SRD-request (used for DPV1 status messages) X
SRD-Repeat
Sends an SRD-request cyclically (used for Ping
messages)
X
MAC-Repeat-Exchange
Exchanges SRD-request or SRD-response data
X
MAC-Reset
Resets ASPC2 during switchover
X
FDL_Status-repeat
Sends an FDL_Status request cyclically (Used for Slave
status messages
X
SAP 10 is used for the DSAP of the responder (local (active) Master) as well as
for the SSAP of the initiator (remote (passive) Master).
The SRD-request is sent as a "low priority" FDL-message.