Chapter 4 – Programming the AC 80
AC 80 User’s Manual 4-3
Control of Drives
through Optical
ModuleBus
ModuleBus has electrical and optical interfaces which are logically the
same bus. A maximum of twelve I/O modules can be connected to the
electrical ModuleBus. Further twelve I/O modules or drives can be
connected to the optical ModuleBus link. A TB810 (10 Mbit/s optical
components) or TB811 (5 Mbit/s optical components) Optical Port is
required for the use of optical ModuleBus.
PC Section
Optical ModuleBus communication does not require any PC elements
in the application program. Thus communication is handled by DB
elements. Transmitted data can be collected together using the Move
function blocks in the PC section, and then connected to DB elements.
DB Section
Inside the DB section, it is possible to control both drive types
(ACS 600 SingleDrive [called “Standard Drive” in this context] and
ACS 600 MultiDrive) as well as I/O modules on ModuleBus. All
connected equipment require their own DB element of a certain type.
The DB elements to be used for ACS 600 SingleDrive on Optical
ModuleBus are DRIDS and DRISTD, while the corresponding elements
for ACS 600 MultiDrive are DRIDS and DRIENG.
The DB elements for S800 I/O modules are the same for both Optical
and Electrical ModuleBus, the only difference being the address
settings of the elements. Refer to the
Electrical ModuleBus
section
later in this chapter.