User manual

Configuring the Module PTQ-PDPMV1 ♦ Quantum Platform
User Manual PROFIBUS DP Master Network Interface Module for Quantum
Page 28 of 306 ProSoft Technology, Inc.
August 12, 2014
The Input Start Register address refers to the 3x (%IW) location in the
processor’s State RAM and the Output Start Register refers to the 4x (%MW)
location of State RAM. You can view State RAM information in Unity XL Pro.
A common mistake is to assume that because the Input Start Register parameter
starts at address 301000, then the PROFIBUS data associated with the slaves
will also start at the same register. As the diagram above shows, the Input
PROFIBUS Data would start at address 301223 for this example.
Important: The Input and Output Start Register parameters define the start registers for the input
and output blocks that are transferred between the processor and the module. The PROFIBUS I/O
associated to the slaves is part of these blocks. Refer to PTQ Input and Output Data Blocks (page
251) for a description. Each block contains status, PROFIBUS data, and Mailbox/Slave
diagnostics, if chosen.
Input Start Register
The Input Start Register address refers to the 3x (%IW) location in the
processor’s State RAM. You can view State RAM information in Unity XL Pro.
Output Start Register
The Output Start Register refers to the 4x (%MW) location of State RAM. You
can view State RAM information in Unity XL Pro.
Input Byte Swap
Swap bytes in input image (YES or NO). The default value is NO.
This is a user-configured flag to indicate if input data is swapped before being
placed in the input image for the controller. If the parameter is set to 0, no
swapping occurs. If it is not 0, then bytes are swapped.
For more information on byte swapping, please refer to Status Data in the Input
Data Block (page 256).
Output Byte Swap
Swap bytes in output image (YES or NO). The default value is NO.
This is a user-configured flag to indicate if output data is swapped after being
received from the controller. If the parameter is set to 0, no swapping occurs. If it
is not 0, then bytes are swapped.
Mailbox Messaging
Use mailbox messaging over the backplane (Y or N with Y=default).
For this example, leave the setting at its default. For more information on the
effect of this setting, please refer to Mailbox Messaging (page 151).