6-28 Using Explicit Messaging
PowerFlex® 755 Drive Embedded EtherNet/IP Adapter User Manual
Publication 750COM-UM001A-EN-P
SLC 500 – Formatting a Message to Write Multiple Parameters
Figure 6.32 Custom Scattered Write Multiple Message Configuration Screens
The following table identifies the data that is required in each box to
format a multiple write message.
General Tab Example Value Description
Size in Words
Receive Data
Send Data
Data Table Address
Receive Data
Send Data
Service
(1)
Service Code
Class
Instance
Attribute
20
(2)
20
(2)
N90:0
N100:0
Custom
4E (Hex.)
(3)
93 (Hex.)
0 (Dec.)
0 (Dec.)
Each word size is a 16-bit integer.
Number of words to be received.
Number of words to be sent.
An unused controller data table address containing the message instruction.
This address is the starting word of the response file.
This address is the starting word of the request file.
Required for scattered messages.
Code for the requested service.
Class ID for the DPI Parameter Object.
Required for scattered messages.
Required for scattered messages.
MultiHop Tab Example Value Description
To Address 10.91.100.79 IP address of the adapter connected to the drive.
(1)
The default setting for Service is “Custom,” enabling entry of a Service Code not available from the Service pull-down menu. When
selecting a Service other than “Custom” from the pull-down menu, an appropriate Hex. value is automatically assigned to the
Service Code box which grays out (unavailable).
(2)
In this example, we are writing to five 32-bit REAL (floating point) parameters. Each parameter being written to requires four
contiguous 16-bit words. Scattered write messages always assume that every parameter being written to is a 32-bit parameter,
regardless of its actual size. The data structure format is shown in Figure 6.36 on page 6-31
. Maximum length is 128 words, which
equates to 32 parameters.
(3)
Service Code 4E write messages are written to the drive’s Non-Volatile Storage (EEPROM) memory, so the parameter value will
remain even after the drive is power cycled. Important: Be very cautious as the EEPROM may quickly exceed its life cycle and
cause the drive to malfunction.
To Next Page
Loading...
Need help?
General
