|
Clock frequency
|
66 MHz
|
|
Number of slots
|
2
4
10
16
6
|
|
Number of racks
|
2 - local rack(s)
|
|
Number of distributed I/O station
|
63 station(s) - 1 rack(s) - 3 Modbus Plus network(s)
|
|
Number of remote I/O station
|
31 - 2 rack(s) per S908 remote I/O
0 - 0 rack(s) per ethernet remote I/O
|
|
Discrete I/O number
|
31744 inputs, 31744 outputs - remote
8000 inputs, 8000 outputs - distributed - per network Modbus Plus
Unlimited (26 slots max) - local
|
|
Analogue I/O number
|
500 inputs, 500 outputs - distributed - per network Modbus Plus
1984 inputs,1984 outputs - S908 remote I/O
Unlimited (26 slots max) - local
|
|
Application specific I/O
|
Serial link
Counter
High-speed interrupt inputs
Accurate time stamping
|
|
Number of optional modules
|
6 (Ethernet, Modbus, Modbus Plus, Profibus DP, Sy/Max)
|
|
Maximum number of connections
|
2 AS-Interface - distributed
2 Modbus (RS232/485 Modbus/ASCII)
4 AS-Interface - remote
6 Ethernet TCP/IP - local
6 Modbus Plus - local
6 Profibus DP - local
|
|
Integrated connection type
|
1 Modbus Plus with
2 Modbus with
|
|
Checks
|
Process control
|
|
Memory description
|
Internal RAM 1056 kB
|
|
Switch function
|
Key switch memory start/stop memory protection
Slide switch communication port : ASCII/RTU/Memory
|
|
Application structure
|
1 cyclic/periodic master task -
1 periodic fast task -
16 timer interrupt tasks -
64 I/O interrupt tasks -
64 interrupt tasks -
No auxiliary task -
|
|
Execution time per instruction
|
0.1...0.27 µs floating points
0.1...0.27 µs on fixed-point arithmetic
0.12...0.585 µs Boolean
0.12...0.585 µs on word
|
|
Number of instructions per ms
|
1.86 Kinst/ms 100 % Boolean
2.49 Kinst/ms 65 % Boolean and 35 % numerical
|
|
System overhead
|
0.2 ms for fast task
1 ms for master task
|
|
Bus current requirement
|
1800 mA
|
|
Local signalling
|
1 LED (green) for communications are active on the Modbus Plus port (Modbus Plus)
1 LED (green) for communications are active on the Modbus port (Modbus)
1 LED (green) for CPU has been started and is solving logic (RUN)
1 LED (green) for CPU has passed the power-up diagnostic tests (READY)
1 LED (orange) for write-protected memory (memory port)
1 LED (red) for battery needs replacing or is not present (BAT LOW)
1 LED (red) for communications error on the Modbus Plus port (ERROR A)
|
|
Electrical connection
|
1 female connector, connector type: SUB-D 9 for connecting to the Modbus Plus network
2 female connectors, connector type: SUB-D 9 for connecting to the Modbus bus
|
