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SC Series Controllers
Configuration
GSD interactive menu button creates a GSD file equivalent to the Profibus I/O map created. Connect a USB
memory stick to the USB port on the bottom of the SC controller.
Use this controller generated GSD file in the PLC connected to the SC controller.
If the Profibus I/O map is changed, a new GDS file must be generated.
Save the changes.
8.1.4.5
Modbus
The Modbus TCP fieldbus does not have any I/O assigned. "See Chapter I/O Menu [} 59]" to learn how to edit
the I/O. "See Chapter Assignable Input and Output Functions [} 61]" to learn about the values to edit. There is
no configuration or programming specifically for the Modbus protocol itself. The Controller's CPU takes care of
all the protocol's overhead and handshaking requirements.
The SC controllers supports the following public Modbus function codes:
01 (0x01) Read Coils
02 (0x02) Read Discreet Inputs
03 (0x03) Read Holding Registers
04 (0x04) Read Input Registers
05 (0x05) Write Single Coil
06 (0x06) Write Single Register
15 (0x0F) Write Multiple Coils
16 (0x10) Write Multiple Registers
Please visit http://Modbus.org for more information about the Modbus fieldbus.
Use the following table to correlate the external PLC addressing to the controller's inputs and outputs.
Memory Type
"1" Coil
"2" Input
"3" Holding Register
"4" Input Register
"5" Force Single Coil
"6" Single Register
"15" Force Multiple Coils
"16" Multiple Register
For Mixed Data Type the type of data depends on the user assigned input and output functions.
It is important to understand that the coils and registers use the same memory.
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Controller I/O
External PLC Address
Type
Input
10001 - 20256
Output
20001 - 20256
Input
30001 - 30256
Output
40001 - 40256
Input
50001 - 50256
Input
60001 - 60256
Input
0F0001 - 0F0256
Input
100001 - 100256
Data
External PLC
Type
Read/ Write
Bit
Read/ Write
Bit(s)
Read
Mixed
Read/ Write
Mixed
Read
Bit
Read/ Write
Mixed
Read/ Write
Bit(s)
Read/ Write
Mixed
Read/ Write
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