3BHE005555R0101 ABB PC BOARD
MControl Profibus connector
Each MControl can be connected to the Profibus via a connector on the front side of the MControl. MControl acts as a standard PROFIBUS Slave device.
3BHE005555R0101 ABB PC BOARD
Connection
The physical medium for PROFIBUS-DP is 3BHE005555R0101 , which allows 32 nodes in a single segment and 125 nodes in a network using 4 segments. Segments must be separated by using Repeater.The PROFIBUS interface checks input signal for poll requests from master and detects the baud rate automatically (max Baud Rate = 12MBit).Cable length may vary from 80-1200 m depending on transmission speed and repeater type in use. Cable length can be extended using fiber optic modems (yielding a more robust network).See reference document [4] for more details on cable connections and wiring.The connection on MControl is done via PROFIBUS Standard Sub-D plugs. This provides a TJunction with up to 12 MBaud communication speed. At both ends of a segment a termination
must be activated. This termination can either be part of the PROFIBUS connector or a separate type.
3BHE005555R0101 ABB PC BOARD
3BHE005555R0101 ABB PC BOARD
In a mixed network, the 3BHE005555R0101 cable length of drop lines must be considered.This is very important especially for higher communication Baud rates !See reference documents [1] & [3] for more information.The MControl does not provide PROFIBUS Termination in-built. Therefore correct measures have to be taken to connect termination to both ends of the PROFIBUS segment.MControl does not support address setting / changing from PROFIBUS Master. The address must be defined with the configuration parameter above and loaded into MControl.If more than 32 devices are connected to a segment, repeater devices have to be used. Such repeater counts as one Slave within a segment without using an address number. Thus only 30 Slaves are possible within a segment.
3BHE005555R0101 ABB PC BOARD
3BHE005555R0101 ABB PC BOARD
Control Access
In case of a disturbed 3BHE005555R0101 communication an option is available to transfer all MControl modules into a safe state. This MStart specific failsafe state has to be defined as a MControl starter parameter (utilizing MNavigate).The DCS / PLC has to set the “Activate Failsafe” bit and “AutoMode” bit if Failsafe shall be generated whenever the Profibus communication to MControl stops or fails.
To request control via Profibus Direct the AutoMode bit must be set in the control structure:
• If the hardware local input is active the control will stay with the local inputs and the AutoMode bit inside the monitoring data will not be set.
• If the hardware local input is not active the MControl will accept the request and set the AutoMode bit in the monitoring data. Also the “CA MControl Fieldbus Interface” bit in the CA section of the MControl status is set. Then the MControl will follow the Profibus
requests.
When clearing the AutoMode bit the control access owner will be set as specified in the setting of the parameter “Control Access Owner” of the direct Profibus interface.
3BHE005555R0101 ABB PC BOARD PDF
3BHE005555R0101 ABB
3BHE005555R0101 ABB PC BOARD
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