7 DEVICE SUPPORT BLOCK (DSB)
Examples for correct configuration: 0, 1, 2, 3, 4 ..... or 1, 2, 3, 4, 5.....
Examples for incorrect configuration: 0,0,1,1,2,2,3,4,5..... or 0,1,2,3,0,1,2,3,4,5.....
In the Low Range column, you must enter the channel low range based on the device that you have
In the High Range column, you must enter the channel high range based on the device that you have
With R410, you can modify the values of the following parameters even after a PDC is associated and
connected to a PIOMB. However, you must ensure that you reload both the DSB and the PIOMB after
modifying the parameter value. If you do not reload both the DSB and the PIOMB, there may be a break in
the connection between the DSB and the PIOMB.
– Number of Channels (NUMCHANNEL) - You can increase or decrease the Number of Channels
parameter value. There is no restriction on increasing the number of channels. However, if you want to
decrease the number of channels, you can decrease the number only until the last assigned channel
number. For example, consider a scenario where you have entered the number of channels of a PDC as
10. However, you have assigned only 6 channels (channel 0 through channel 5) to the PROFIBUS
channels. In this scenario, you can reduce the Number of Channels value to 6. If you try to reduce the
Number of Channels value to 5 or less, an error message appears.
– Channel Description (CHDESCRIPTION)
– Channel Type (CHANNELTYPE) - You can modify the Channel Type of a channel only if it that
particular channel is not associated with any PROFIBUS channel.
– Channel Data Type (CHANNELDATATYPE) - You can modify the Channel Data Type for both used
and unused channels. However, you must ensure that while modifying the channel data type for analog/
numeric channels, you must not select Boolean data type. For digital channels, you must only select
Boolean data type.
– Channel Low Range (CHLOWRANGE)
– Channel High Range (CHHIGHRANGE)
– Channel Data Offset (CHDATAOFFSET)
– Channel Bit Offset (CHBITOFFSET)
About Extended Diagnostic PDC
The Extended Diagnostic PDC is different from normal input or output PDC. Extended diagnostic PDC can be
configured to parse extended diagnostic data as channel values and transfer these channel value to PIOMB. You
can configure multiple extended diagnostic PDC depending on your requirement to parse extended diagnostic
data. If there is no extended diagnostic data available, all channel values will be 0.
7.16.2 Generic Drive DSB specific PDC configuration guidelines
The following list summarizes the Generic Drive DSB specific PDC configuration guidelines that you must
remember while configuring the Generic Drive DSB PDC.
The number of PDCs supported by Generic Drive DSB is 16.
You need not associate a net tag name to the Extended Diagnostic PDC.
Extended diagnostic PDC supports multi bit processing for "AI" channel type with data type "UINT8." For multi
byte processing, data type such as UNT16, UINT32, and FLOAT32 can be used.
The CHBITFIELD parameter can be configured with the number of bits to be parsed in a byte for multibit
processing. The value of CHBITFIELD is 8 by default and is configurable only if PDCTYPE is selected as
"Extended Diagnostic" and Channel Data Type is selected as "UINT8" within "Extended diagnostic PDC. For all
other configuration, it is not available for configuration.