If however, you need it more real-time, you may want to consider a lower-end S7-1500 to handle the transactions. Upon successful receipt or a timeout, you could then poll another bank of PLCs. With some care, you could configure your logic to poll banks of 4 or 5 remote PLCs at a time for data.
In this design, is each PLC will act as modbus master and the communication will profinet between two PLCs?Ģ- do the PROFINET communication occurs over any brand network switch or router? in other words can i connect the PLC to any brand switch like Cisco or Juniper in additon to the router?ģ- Do SIEMENS buy a special network rack that we can install the PLCs in it? i mean in the central site?Ĥ- i didn't understand your point "The powerles on each CPU is dependent of the numbers of inputs and outputs and the size of the STEP 7 program.?"ġ- i got a reponse that each PLC S7-1214C can connect up to 8 remote PLCs (each PLC in different geographical location) using PROFINET so in my case i need two PLCs in the central site that the HMI application will talk through them and get real time data from SEPAMs using the PLC in each geographical location. And also between PLCs in the central siteĤ- Is there is a special rack for the central site that hosts the PLCs?ĥ- in addition, can we use other network switch and router other than SIEMENS instead of SIEMENS switch?ġ- i got a reponse that each PLC S7-1214C can connect up to 8 remote PLCs (each PLC in different geographical location) using PROFINET so in my case i need two PLCs in the central site that the HMI application will talk through them and get real time data from SEPAMs using the PLC in each geographical location. The question is, can we do a two HMI programs screens, one for IPVPN network communication and the other IS through GSM/GPRS communication?ģ- I'm confused with which protocol to use PROFINET or Modbus? My understandings is Modbus between the SEPAMs and the PLC and PROFINET between PLC and the network switch. b with each PLC S7-1214C we will connect a Communication processor CP 1242-7 for connection of SIMATIC S7-1200 to GSM/GPRS NET as a second option in case the IPVPN network is down. SIMATIC WINCC Logging for runtime advanced option F.ġ- how many S7-1214C PLCs are required to get data and control for the 13 remote sites to be placed and installed in the central site?Ģ- We will use the following communication options to connect the 13 remote sites with the central site (HMI):Ģ.a: we will connect each PLC S7-1214C with Ethernet switch in each location and that switch is connected to a Cisco router and that router is connected to a special IPVPN network from our provider.Ģ. SIMATIC WINCC runtime advanced 512 powertags runtime software.
SIMATIC WINCC advanced engineering software.
SIMATIC STEP & PROFESSIONAL engineering software. The central site will has the following devices and software: Number of main stations and substations are 13 remote sites.Įach site will has a SIEMENS PLC S7-1214C so I need 13 PLCs S7-1214C. I have a project to read and control overpower main station and power substations.