Hardware manual

Impact Send Message Impact Reference Guide
Datalogic Automation Inc. 3-194
The EtherNet/IP Write Implicit Assembly tool provides a method for writing to a reserved data area (called
a static assembly) on the Impact device. Other EtherNet/IP devices can read data from this area. Additional
inputs, which are appended to the static assembly, can be added.
To create a new input, click the Add Input button, then select the data type from the type properties drop
down.
The tool has an additional General property - Offset.
• Offset - This value indicates the static assembly location where the tool should begin writing. This
allows multiple VPM EtherNet/IP tools to read from the static assembly.
Using an Electronic Data Sheet (EDS) file
The EDS file provides a connection example for clients wishing to communicate bidirectionally with the
Impact implicit assemblies (4K bytes O->T, 4K bytes T->O). It provides two client-side parameters for the
PLC user to configure the size of O->T and T->O communication. Note that some PLC devices do not
accept configurations greater than 256 bytes whereas Datalogic Impact supports up to 4K bytes.
The connection is configured as fixed size, scheduled, program/idle included, point-to-point O->T and fixed
size, scheduled, multicast T->O. Datalogic Impact's implicit assemblies are currently 32-bit word assemblies
so the EtherNet/IP Read/Write Implicit Assembly tools consequently read and write tool data ports as 32-bit
values.
Hexadecimal display is not available on the Impact device. This can be at odds with some PLC device’s 16-
bit hex words. Even if both the Impact and the PLC device use little-endian for the data, the PLC may do this
on 16-bit boundaries while the Impact device does it on 32-bit boundaries. Consequently the PLC device
user must handle the data with this difference in mind.
Impact Send Message
In the Communication Drawer
The Impact Send Message tool sends data from one Impact camera to another. Use the Impact Wait For Mes-
sage tool to receive the data. There is a setup for this tool. See “How to set up the Impact Send Message
tool” on page 3-195.
NOTE: To use this tool with an A10, A20, T3x, or C-Series smart camera, the property Enable Maximum
Timestamp Difference must be disabled.
Input Name What it is
Address The IP Address of the device that will receive the data. The receiving
device must have a program that contains an Impact Wait For Message
tool.
Number The Message number (from 0 to 255). Enter the number of which Wait
For Message tool in the other camera will receive this message.
Input ... Defined inputs are listed.
Output Name What it is
Passed If True, the message was sent. This does not imply that the correspond-
ing Wait For Message tool received the message.