Lenze i550

6 EtherNet/IP
Acyclic Data Access (Explicit Messaging)
42 Lenze · Inverter i550 - Cabinet · Ethernet Manual · 0.1 EN · 12/2015
Service Code = 10 (Set Attribute Single)
Instance = the assembly number in the drive desired (i.e. Assembly 23 would be 23)
Source Element = variable in the PLC used as the source of the data for a write (must be in INT format)
When writing an Assembly, set the source length equal to the same number of bytes contained in the
desired assembly (i.e., Assembly 23 contains 3 words which equals 6 bytes).
To read assembly data from the iSeries drive using EtherNet/IP explicit messaging set the following:
Message Type = CIP Generic
Class = 4 (Hex)
Attribute = 3
Service Code = e (Get Attribute Single)
Instance = the assembly number in the drive desired (i.e. Assembly 73 would be 73)
Destination = the target variable data from the drive will be copied to in the PLC
Make sure the tag used as the destination is an array in INT format with the same length as the desired
assembly.
Explicit Message Path
For any explicit message the path will need to be set to route the message out the controller’s Ethernet port to
the IP address of the Drive. This path will differ with the PLC used. Consult the PLC manufacturer for assistance
with determining how to set this path if needed.
Explicit Messaging Timeout
It is often desirable to set a fault timeout condition to prevent the drive from operating in a runaway condition.
To do this while controlling the drive via explicit messaging, set Overall Ethernet Timeout Time 0x23A1:10 and re-
action accordingly 0x2859:7.
Torque scale (Class 2a, instance 1, attribute 18) is related to actual torque command by the following equation:
Torque reference in Scaled Torque = Nm * 2TorqueScale. By setting TorqueScale = 0, Torque Reference (Assembly
23 word 2) is actual NM commanded torque (=NM *20= NM*1=NM). Loading a value of 2 to
Motec_Torque_Reference thereby commands a torque limit from the drive of 2 NM.
Drive_Mode (Class2a, instance1, attribute 6) has only two valid settings: "3" for Torque Mode, or "1" for Velocity
Mode.
Both Drive Mode and TorqueScale are AC drive profile objects. They are defined in the CIP library. These objects
are in class 2a with the Instance =1, and the attribute number as listed above. These variables are all data type
SINT and must have the source length set to 1 byte.