Configuring Parallel Redundancy Protocol - Danfoss iC7 Series Operating Manual

iC7 Series Modbus
Operating Guide

5.4 Configuring Parallel Redundancy Protocol

Parallel Redundancy Protocol (PRP) is based on the parallel transmission of information by sending duplicate frames to 2 independ-
ent network infrastructures known as LAN A and LAN B. Each PRP node has a connection to each of the networks called double
attached nodes (DAN) in PRP terminology.
PRP is implemented in the end devices only. The Ethernet switches in the network have no specific PRP capabilities. Standard devi-
ces with a single network interface are referred to as single attached nodes (SAN) and can by default be connected directly to 1 of
the 2 networks. Alternatively, a SAN can be connected via a redundancy box (RedBox) that connects 1 or more SANs to both LAN A
and LAN B networks.
1.
In MyDrive Insight, go to Interface configuration → Ethernet Redundancy → PRP → Settings to configure PRP settings.
®
Function Value
PRP Interface
-
-
Enable VLAN
-
-
VLAN id 0–65535
2.
In MyDrive Insight, go to Interface configuration → Ethernet Redundancy → PRP → Status to check PRP status.
®
Function
Valid frames on LAN A
Valid frames on LAN B
Duplicate frames on LAN A
Duplicate frames on LAN B
Wrong LAN ID frames on LAN A
Wrong LAN ID frames on LAN B
Missing frames
Out of sequence on LAN A
Out of sequence on LAN B
Out of sequence low on LAN A
Out of sequence low on LAN B
Warning count on LAN A
Warning count on LAN A
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Description
Enables or disables PRP on the X1/X2 interface.
Disabled (default)
Enabled X1/X2
Enables or disables the transmissions of VLAN ID in the PRP supervision
Disabled (default)
frames.
Enabled
VLAN ID used in PRP supervision frames when VLAN is enabled.
Description
Valid frames received on LAN A with a valid sequence number.
Valid frames received on LAN B with a valid sequence number.
Valid frames received on LAN A dropped by duplicate detection.
Valid frames received on LAN B dropped by duplicate detection.
Valid frames received in LAN A with mismatching LAN ID.
Valid frames received in LAN B with mismatching LAN ID.
The counter is incremented if there is a jump in the sequence number, indicative of
frame drop in both LANs.
Valid and accepted frames received on LAN A with an unexpected sequence num-
ber.
Valid and accepted frames received on LAN B with an unexpected sequence number.
Valid and accepted frames received on LAN A with a sequence number outside du-
plicate window.
Valid and accepted frames received on LAN B with a sequence number outside du-
plicate window.
The counter is incremented if wrong frames or no PRP frames are received on LAN A.
The counter is incremented if wrong frames or no PRP frames are received on LAN B.
Modbus Configuration
AQ456329149698en-000101 / 136R0334