snp,modbus rtu
- Thread starter HAROON
- Start date
Steve Bailey
Lifetime Supporting Member + Moderator
They are two serial communications protocols. You can think of them as the 'language' spoken by two pieces equipment that need to pass information between them.
Both of them are master/slave protocols. That means that one of the devices is designated as the master, the other device is the slave. The master device is the one that initiates all communications. The slave can only respond to communications commands from the master.
SNP is a GE Fanuc standard. Modbus RTU came from Modicon PLCs, but is now in widespread use. When you need to provide serial communications between devices from two different manufacturers, Modbus is quite often the only protocol supported by both.
The details of the Modbus RTU protocol are publicly available. The details of the SNPX protocol are also publicly available. SNPX is a stripped-down version of SNP, limited to passing data between PLCs.
For more details, you can go to this website:
http://globalcare.gefanuc.com/search/glbCareProdManuals.asp
and find the manual GFK-0582.
Both of them are master/slave protocols. That means that one of the devices is designated as the master, the other device is the slave. The master device is the one that initiates all communications. The slave can only respond to communications commands from the master.
SNP is a GE Fanuc standard. Modbus RTU came from Modicon PLCs, but is now in widespread use. When you need to provide serial communications between devices from two different manufacturers, Modbus is quite often the only protocol supported by both.
The details of the Modbus RTU protocol are publicly available. The details of the SNPX protocol are also publicly available. SNPX is a stripped-down version of SNP, limited to passing data between PLCs.
For more details, you can go to this website:
http://globalcare.gefanuc.com/search/glbCareProdManuals.asp
and find the manual GFK-0582.
Similar Topics
Hi Folks, especially anyone who remembers the GE Fanuc 90-30.
We've got one , and an old XP laptop , with a converter cable, and ECLiPS .
We...
Is there any documentation on GE FANUC SNP protocol with source codes and possibilites to read and write data on Versamax?
Modbus is very limited...
I'm trying to establish snp serial communication between GE Fanuc CPM-790 programmers port ( 15-pin, RS-485) using 4-wire connection. On the PC...
Hello,
I am trying to set the SNP ID on a GE Series 90 micro controller. I connect to the device in PME and when connected I am not able to edit...
I pulled the power supply and first module to have a look at the CPU Chip
I Read the Label "395-027C- 6.51"
I "***-umed" that implied a revision...