The exposed pins on the free unplugged connector are a short-circuit risk and could cause a complete network failure. Profibus connector- single and double cable. A proposal is made to use the M12 cicular connector please take a look at the attachement to connect two cables. Actually the client's idea could work, but I personally have no experience in that type of solution.
Do you have a benchtest where you could at least try it out before assembling in the field, as a demonstration? It would also give you time to experiment with M12 connections, if you have never played with them, before you have to install them on the plant floor. Register Login. Industry Online Support. Product Support Services Forum mySupport. Rating 0. Thanks 2. Attachment Picture 2. Attachment 1. Thank you in advance! Attachment Profibus connector- single and double cable. Share this page:.
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Hello Daniel, Thank you for your quick reply. Hope this helps, Daniel Chartier Attachment Profibus connector- single and double cable. Hello Daniel, Thank you so much! Your answer really helps. The customer gives up the unoficial connection. The DIP switches should not be activated if the network connector already has the terminating resistors.
Recommendations to perform the product connection in this network are presented next. The maximum allowed transmission line length depends on the used baud rate, and this correlation is showed on the table 3. Table 3. The SCA06 Profibus DP interface has automatic baud rate detection, according to what has been configured for the network master, and therefore it is not necessary to configure this option.
It is possible to observe the baud rate detected by the board at the parameter P This address must be different for each device. The cable has a pair of wires that must be shielded and twisted, in order to guarantee higher immunity against electromagnetic interference. By using repeaters, up to addressable equipments can be connected to the network.
Each repeater must also be included as a device connected to the segment, even not occupying a network address. Generally, the Profibus network connector itself has an input and an output for the cable, allowing the connection to be taken to the other network points.
Derivations from the main bus are not recommended, especially for baud rates higher or equal to 1. Figure 3. All the drives must be properly grounded, preferably at the same ground point. The Profibus cable shield must also be grounded. The SCA06 Profibus board connector itself already has a connection with the protective ground and, therefore, makes the connection of the shield to the ground when the Profibus cable is connected to the drive.
However a better connection, implemented by clamps that connect the shield to a ground point, is also recommended.
The use of specific Profibus network connectors with a switch to enable the resistor is recommended, which must only be enabled ON position if the equipment is the first or the last element of the segment. The DIP switches present in the communication module also can be used to enable the termination resistors. It is important to emphasize that in order to be possible to disconnect the element from the network without impairing the bus, it becomes interesting the use of active terminations, which are elements that have only the termination function.
Therefore, any drive of the network can be disconnected from the bus without impairing the termination. This file describes the characteristics of each equipment and it is used by the Profibus DP network master configuration tool. During the master configuration the GSD configuration file supplied with the equipment must be used.
In cases this mode is programmed, commands and references for the product operation will be provided by cyclic data via Profibus DP network. Table 4. Instead of alarm, a communication error causes a fault on the equipment, and it is necessary to reset the faults so as to return to normal operation. The alarm will be indicated together with the execution of the STOP command. It is necessary to reset the faults or disable the drive for the servo to exit this condition.
The alarm will be indicated together with the execution of the disable command. A problem was identified during the Profibus interface initialization. The Profibus interface is installed and properly configured, but no cyclic communication is established.
During data exchange with the master, the slave received a command to enter the clear mode. The speed reference and motor speed words for this profile are described next.
The control, status, speed reference and motor speed words have values and functions specific for SCA06 servoconverter. The description of each word is done in the item 5. Negative speed values indicate reverse speed direction. By using these parameters it is possible to program the number of another parameter whose content must be made available at the network master input area. SCA06 14 Programming If, for instance, one wants to read from the SCA06 servoconverter the motor current in Amps, one must program the value 3 in one of these parameters, because the parameter P is the one that contains this information.
It is worthwhile to remind that the value read from any parameter is represented with a 16 bit word. Even if the parameter has decimal resolution, the value is transmitted without the indication of the decimal places. These parameters are used only if the equipment is programmed at the parameter P to use the options 5 to 16 configuration telegrams to Up to 16 words to be read by the network master can be made available, according to the selected option.
The first two input words are fixed and represent the status and the motor speed. The words 3 and 4, when programmed, represent the current and control mode for servomotor. The value 0 zero disables the reading in the word. The number of input words, however, keeps the same as programmed at P Using these parameters, it is possible to program the number of another parameter whose content must be made available at the network master output area.
If, for instance, one wants to write the ramp for STOP function value in the SCA06 servoconverter, one must program the value in one of these parameters, because the parameter P is the one where this information is programmed. It is worthwhile to remind that the value written in any parameter is represented with a 16 bit word. Up to 16 words to be written by the network master can be made available, according to the selected option.
SCA06 15 Programming The first two output words are fixed and represent the control and the speed reference. The words 3 and 4, when programmed, represent the current reference and control mode for servomotor.
Thus, if the equipment is turned off and on again, these parameters will return to their original value. It is necessary that each of the equipments in the network has an address different from the others. If this parameter is changed, the slave will assume the new configuration only when there is no cyclic communication with the master. During the network master configuration, by using the GSD file, it is possible to select the desired data module for the exchange of cyclic data between the master and the slave.
The value programmed in this parameter must coincide with the module selected by the network master configuration tool. If any fault indication occurs at the equipment, this counter will be incremented. For the SCA06 servoconverter only one fault at a time is registered, thus, this counter has a maximum value of 1. The value 0 zero indicates that the drive is not in fault status. The parameter content is reset together with the drive reset. If any fault occurs in the equipment, this parameter will have the code of the occurred fault.
This parameter has 5 sub-indices with information on the drive, but the sub-indices 1 to 4 are accessible only using the acyclic access to parameters defined by the PROFIdrive profile. Other interfaces access only the sub-index 0. This parameter can only be changed via Profibus DP interface. In order that the commands written in this parameter be executed, it is necessary to program the drive to be commanded via Profibus DP on parameter P Each bit of this word corresponds to a command that can be executed by the drive: Table 4.
Not used for SCA Reserved 0: It resets the speed reference. Reserved Reserved. The speed direction reversion can be done by sending a negative value to the speed reference. Each bit of this word corresponds to one state: Table 4. Reserved 0: No limit switch clockwise signal. Negatives values represent the motor spinning counterclockwise. In this word, it is indicated the instant speed value, without filter.
For this reason, it is normal the oscillation of the value read around the operation point.
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