Lenze SMVector - 6 Acyclic Data Access; What Is Acyclic Data; Explicit Messaging

47 CMVETH01B
Acyclic Data Access
6 Acyclic Data Access
6.1 What is Acyclic Data?
• Acyclic / non-cyclic / Service access provides a method for the network master to access any drive or
module parameter.
• This kind of parameter access is typically used for monitoring or low priority non-scheduled parameter
access. However it can also be used to control the drive by writing assembly data.
• The SMV EtherNet/IP module supports several different methods of doing this.
6.2 Explicit Messaging
An explicit message is a logical instruction in the PLC's program used for messaging. It can be used to
read/write to either a parameter setting or an assembly's data. In the case of CompactLogix, ControlLogix
and SoftLogix the MSG instruction provides the capabilities described in this section. For other PLC types,
consult that PLC's programming documentation.