Pilz PSSnet GW1 MOD­-CAN Operating Manual page 20

Function description
4.2.2 Data transfer limits
This table contains the maximum data lengths supported per telegram:
Data transfer
Read data (Bit)
Read data (Word)
Write data (Bit)
Write data (Word)
Read and write data (Word)
Data transfer limits
4.2.3 Function codes (Client connections)
The connection Client can access the Gateway's data areas using the following function
codes (FC):
Operating Manual PSSnet GW1 MOD­CAN
1002693­EN­03
INFORMATION
Addressing for Pilz systems starts at "0". On devices from other manufactur­
ers, addressing may start at "1".
Please refer to the operating manual provided by the relevant manufacturer.
FC 01 (Read Coils)
FC 02 (Read Discrete In­
puts)
FC 03 (Read Holding Re­
gisters)
FC 04 (Read Input Register)
FC 05 (Write Single Coil)
FC 15 (Write Multiple Coils)
FC 06 (Write Single Re­
gister)
FC 16 (Write Multiple Re­
gisters)
FC 23 (Read/Write Multiple
Registers)
INFORMATION
There may be some restrictions in data length, depending on the device that
is used. Please refer to the information stated in the operating manual of the
relevant unit.
Max. data length per tele­
gram
1 ... 2000
1 ... 125
1 Bit
1 ... 1968
1 Word
1 ... 123 Words
Read 1 ... 125 Words
Write 1 ... 121 Words
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