Yaskawa SI-EN3D - Manual (Page 46)

Instance
ID
Attribute Name Description Get Set Size Range Default
1 27
Voltage Scale
(-15 to 15)
Setting for F7-21, scale of units for
voltage related data.
O O Byte -15 to 15 0
1 28
Time Scale
(-15 to 15)
Setting for F7-22, scale of units for
speed related data.
O O Byte -15 to 15 0
1 29
Reference from
Net (Status)
Status of Reference Command
(1 = Network).
0: As set by the drive parameters
1: Network
O – Byte – 0
u DLR Object 71 (Class 0x47)
Device Level Ring (DLR) is a layer 2 protocol allowing for redundancy in EtherNet/IP based ring topology networks. DLR
allows devices to be placed in a ring to reduce the need for switch hardware and cabling and allow for the detection and
recovery of faults in the ring. This option is a beacon based ring node implementation.
To set up a DLR network, configure a supervisor on the network prior to connecting and powering on all devices in the ring.
Establishing a ring without an active supervisor may cause a loss of communication to devices on the ring.
The supervisor precedence must be configured when setting up the supervisor. Typically, the default beacon rate is 400 ms to
allow for faster fault detection and recovery period and should be fast enough for devices to recover on the ring without losing
an I/O connection. The precedence value for the supervisor is used when more than one supervisor is present. When two
supervisors are on the network, the supervisor with the higher MAC address will become the supervisor and the other will
become a backup supervisor.
Yaskawa recommends that all devices in the ring be DLR capable. Add non-DLR devices to the ring through a DLR-capable
device, such as a 3-port ETAP.
Ensure that non-DLR devices placed in the ring meet the following requirements:
• Disable MAC address learning
• Do not use multicast filtering
• Preserve VLAN tags.
Make sure that all switches in the ring are DLR-aware. Switches in the ring that are not DLR-aware may cause undesired
behavior due to MAC address learning of the supervisor beacon packets being received on two different switch ports.
Be sure to set the RPI only as fast as needed to limit the network traffic. Yaskawa supports RPIs down to 10 ms. However, if
a slower level of control is acceptable, a slower RPI setting will reduce network traffic.
Yaskawa also recommends setting up and configuring all devices prior to completing the ring by leaving one cable
disconnected. Make the last connection after configuring the nodes and supervisor.
Note: DLR is supported in option software versions VST800341 and later.
n Services Supported
Service Code No. (Hex) Service Name
01 Get Attribute All
10 Set Attribute Single
n Attributes Supported
Instance
ID
Attribute Name Description Get Set Size Range Default
0 1
Object Software
Revision
Revision number of the DLR Object O – Word – 3
1 1
Network
Topology
Current network topology mode
0: Linear
1: Ring
O – Byte 0, 1 0
1 2 Network Status
Current status of network
0: Normal
1: Ring fault
2: Unexpected loop detected
3: Partial network fault
4: Rapid fault/restore cycle
O – Byte 0 to 4 –
10 General Class Objects
46 YASKAWA SIEP YAICOM 16A 1000-Series Option Dual-Port EtherNet/IP SI-EN3D Technical Manual