User manual

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.