Profinet IO Industrial Protocol Over Ethernet TCP/IP
The Profinet protocol implementation for the LMD uses 128 bytes of I/O data to execute MCode commands and set parameters in the drive.
Rotary products
Liberty MDrive Ethernet rotary stepper motor products with Profinet IO are available in standard sizes: NEMA 17, NEMA 23 & NEMA 34.
Linear products
Liberty MDrive Ethernet external shaft stepper motor linear actuator products with Profinet IO are available in standard sizes: NEMA 17 & NEMA 23.
Profinet resources
Start Guide:
- Set the drive for Profinet IO communications, write the unique name (see below) to the drive:
- Download and install the GSDML file
Configure the PAC hardware so Profinet is LAN 2. Right click on PACSystems***, select Configure, Settings tab LAN2 Mode set to PROFINET.
The RSTi-EP ships with the ethernet address 192.168.0.100, set the desired address on the ethernet connection. Right click on Ethernet, select Configure.
Next set the PROFINET address by right clicking PROFINET, selecting properties, and then set the address in the inspector. The Profinet address cannot be on the same subnet as the PLC. This may require changing the IP of your network card.
Right click on PROFINET under hardware configuration and select Add IO Device. Select the Have GSMDL button and locate the GSMDL for your Liberty* Mdrive. Select the GSDML in the Device Catalog.
- Set devices and network in the PLC.
Right click on the device mdrive (#1) [Standard, no PDev], select the I/O and assign to slot 1 and 2.
Right click on Slot 1, and set the beginning input address. Right click on slot 2, and set the output address. The GE-PAC uses a LIFO Profinet so a word swap is required, see examples.
Automation Examples
The GE-PAC requires swapping words in the data-gram to be interpreted correctly. This is an example for inputs:
The GE-PAC requires swapping words in the data-gram to be interpreted correctly. This is an example for outputs:
Profinet communication
PROFINET name conventions:
To be able to communicate with PROFINET devices, the devices have to be assigned names. These names are the device names in the Hardware Configuration. These names must comply with the PROFINET name convention. The Hardware Configuration checks compliance with the name convention and corrects accordingly. Invalid characters are replaced by “X”. Capital letters are not recommended. Liberty* Profinet units have a 32 character device name limit.
Restrictions:
Limit of a total of 127 characters (letters “a” to “z”, numbers “0” to “9”, hyphens, periods).
A name component within the device name, a character string between two periods, for example, must not be longer than 63 characters.
No special characters like umlauts, parentheses, underscore, slash, space etc. The hyphen is the only special characters allowed. The device name must not contain uppercase letters.
The device name must not begin nor end with the “-” or “.” character.
The device name must not begin with a number.
The device name must not have the form “n.n.n.n” (n = 0…999).
The device name must not begin with the character string “port-xyz-” (x,y,z = 0…9).
Device names are assigned to the PROFINET I/O devices in the commissioning phase
*Previously Lexium
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