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PROFIBUS MODULE (CB15/CB155)
1. OVERVIEW
1.1 Description and Features
The PROFIBUS Module (CB15/CB155) is a device that allows control of an inverter over a PROFIBUS-DP (SINEC
L2-DP) serial bus.
Features
Retains the ability to access the internal parameter set of the inverter (CB15 only).
Allows high speed cyclical communication over a PROFIBUS link.
Ability to control up to 125 inverters using the PROFIBUS-DP protocol.
Provides open communication conforming to all relevant aspects of DIN19245 Part 3. It may be used with any
other PROFIBUS-DP/SINEC L2-DP peripheral on the serial bus.
Easy to install.
Easy to configure with proprietary Siemens COM ET 200 software (parameterisation disc included).
Output frequency (and hence motor speed) can be controlled by one of five methods:
(1)
Digital frequency setpoint.
(2)
Analogue setpoint (voltage or current input).
(3)
Motor potentiometer.
(4)
Fixed frequency.
(5)
Remote data transmission via the PROFIBUS link.
IMPORTANT
The RS485 serial link is not available while the CB15/CB155 is connected to the inverter.
1.2 Application on a PROFIBUS Link
PROFIBUS-DP is defined as a draft standard in DIN 19245 Part 3. Data communication with the CB15/CB155
conforms to the specifications in the VDI/VDE 3689 ' PROFIBUS Profile for Variable Speed Drives' guideline. This
defines the user data structure through which a master can access the drive slaves. The user data structure is
subdivided into two areas that can be transmitted in each message frame:
Process data, i.e. control words and setpoints, or status information and actual values and
A parameter area for reading/writing parameter values, e.g. for reading out faults or information on the
attributes of a parameter, such as minimum/maximum limits, etc.
The structure of the user data is designated as Parameter Process data Objects (PPO) in the PROFIBUS variable
speed drives profile (VDI/VDE guideline 3689). There are five PPO types: user data with no parameter area with
two words or six words of process data, or user data with a parameter area and two, six or ten words of process
data.
The CB15/CB155 only supports PPO types 1 and 3.
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English
Operating Instructions
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