Modbus TCP
Modbus is an internaonally approved Ethernet-based communicaon protocol, designed for
commercial and industrial automaon applicaons.
General informaon
Design Oponal
Integrated in standard I/O
DC supply of the control electronics
and oponal eldbus
internally via the inverter Mains-dependent
oponally:
External supply
Mains-independent
24 V DC
at X3/24E...GND
Technical data
Communicaon prole Modbus/TCP
Bus terminang resistor not required
integrated bus terminang resistor No
Network topology
Without repeater Tree, star and line
With repeater -
Staon
Type Adapter (slave)
Max. number 254 Per subnetwork
Address Staon name
Max. cable length m - Not limited
The length between the nodes is decisive.
Max. cable length between two nodes m 100
Process data
Transmit PDOs 256 bytes
Receive PDOs 256 bytes
Cycle me ms > 4
Switching method -
Switch latency µs ~ 125 At maximum telegram length
Other data Addional TCP/IP channel
Communicaon me
Communicaon me depends on
Processing me in the inverter Time between the start of a request and
arrival of the response
Telegram runme (baud rate, telegram
length)
Nesng depth of the network
Bus load
Processing me of process data
Update cycle, mulple of ms 10 In the inverter
Processing me ms 0 ... 1
applicaon task runme of the technology appli-
caon used (tolerance)
ms 1 ... x
Product extensions
Networks
Modbus TCP
226