The PLC Siemens SIMATIC S7-1200 enables point-to-point communication via the CPU extension with the interfaces RS485 und RS232. sebenarnya dari versi sebelumnya bisa dilakukan tetapi semuanya tidak free, sekarang di plc siemens S7-1200 sudah bisa langsung dilakukanīerikut kutipan yang di ambil dari web resmi support siemens
SIEMENS SIMATIC S7 1200 LLPD SERIAL
PLC Siemens umumnya mengalami kesulitan dalam koneksi modbus, khusunya ke peralatan dengan modbus serial seperti power meter, protection relay dan lainnya. To find out more and see LLDP in action, attend a PROFINET training class soon.A MODBUS-RTU communication with PLC SIEMENS SIMATIC S7-1200? So, if you want easy commissioning and the best diagnostics and measurements out there to know how things are connected to your network (even your neighborhood), using PROFINET with LLDP “under the hood” makes this all possible. This information can be read out to see the real time network characteristics and delay values. The fourth and final benefit of LLDP would be the interchange of network delay information between the device switches. We’ll cover this in a separate article in more detail.
SIEMENS SIMATIC S7 1200 LLPD SOFTWARE
So a broken / failed device could also be replaced and come up automatically without using any software tools. Based on the known topology the controller can bring up a device and automatically assign its device name using an LLDP ‘alias’ name, so this makes bringing up the network a cinch. Simple Device Commissioning and ReplacementĪnother benefit of using LLDP with PROFINET is simple device commissioning and device replacement. By using the mechanisms in PROFINET, this is like a “neighborhood watch” added to our system. If any changes to the topology are detected, the controller will get an alarm from the affected station (for example ports got swapped) or the station’s neighbor (downstream device is disconnected from the network, cable break). This topology can now be saved as your ‘baseline’ and downloaded into the PROFINET IO controller. During startup, the devices begin to exchange LLDP information and the topology information can be read from the devices by the PROFINET engineering tool. So to now move this into a PROFINET system context, you can setup your PROFINET system including the controller and devices. Now you know the name and information from each device, including the one at the end of the line (street)! Using LLDP with PROFINET By reading this LLDP information you can map the entire PROFINET network (the entire neighborhood). Information stored in the device includes system name and description (type of device), port name and description, IP management address, system capabilities, other network information and more. This table can be read out with Simple Network Management Protocol (SNMP) or through a PROFINET acyclic read record request. This is then stored in a data table known as the Discovery Management Information Base (MIB). Did you know everyone that lived there at every house? What about the people who live at the farthest end of the street? A device which supports LLDP will send a message to their neighbor stations on each switch port every few seconds to identify itself and give network related information. What is LLDP?įirst off, to describe what LLDP is, think of neighbors or a neighborhood where you’ve been. Finally the fourth would be to share network line and switch delays for high speed motion applications. The second is for easy device commissioning when setting up the network and third would be simple device replacement in case any device fails. The first is to be able to discover, check, and maintain the topology of the PROFINET network and obtain diagnostics if something changes.
There are multiple reasons for LLDP support.
Unlike other competitor networks, all PROFINET devices support Link Layer Discovery Protocol (LLDP) which is defined in IEEE standard 802.1AB.
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