Technical Data
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PC Cards cifX Compact PCI, Mini PCI, Mini PCIe, PCI-104 | Installation, Operation and Hardware Description
DOC120205UM53EN | Revision 53 | English | 2019-03 | Released | Public
© Hilscher, 2008-2019
10.4.7 Open
Modbus/TCP
Parameter
Description
Maximum number of input data
2880 Registers
Maximum number of output data
2880 Registers
Acyclic communication
Read/Write Register:
- Maximum 125 Registers per Read Telegram (FC 3, 4, 23),
- Maximum 121 Registers per Write Telegram (FC 23),
- Maximum 123 Registers per Write Telegram (FC 16)
Read/Write Coil:
- Maximum 2000 Coils per Read Telegram (FC 1, 2),
- Maximum 1968 Coils per Write Telegram (FC 15)
Modbus Function Codes
1,
2,
3,
4,
5,
6,
7,
15,
16,
23*,
43
* Function Code 23 can be used via the packet API, but not with
the Command Table.
Protocol Mode
Message Mode (Client Mode):
- Client (using the Command Table: The data is stored in the I/O
process data image)
- Client (using the packet API: The I/O process data image is not
used)
- Server (using the packet API: The I/O process data image is not
used)
I/O Mode (Server Mode):
- Server (only) (The data is stored in the I/O process data image)
Command table (Configuration API only)
Max. 16 servers configurable
Max. 256 commands
Baud rates
10 and 100 MBit/s
Data transport layer
Ethernet II, IEEE 802.3
Reference to firmware/stack version
V2.6
Table 175: Technical Data Open Modbus/TCP Protocol
