WAGO 750 Series User Manual

190 • Bootloader (U-Boot)
Environment Variables
WAGO-I/O-SYSTEM 750
Linux Fieldbus Coupler
The following environment variables are available for a software update:
• ipaddr
IP address of the Linux fieldbus coupler
• ethaddr
MAC address of the Linux fieldbus coupler
• serverip
IP address of the TFTP server
• netmask
Netmask of the network
• update-rootfs
Macro for a root file system update
• update-kernel
Macro for a Linux kernel update
Note
Please refer to chapter 9.2 for details on a TFTP server setup (required for a
software update)..
The following environment variables can be used to determine the standard
interfaces:
• stdin
Standard input interface
• stdout
Standard output interface
• sterr
Standard error output interface
• baudrate
Baud rate of the serial interface
An update of the environment variables via the Linux operating system is
executed via the device interface /dev/mtdblock5. The wagoset example
program was developed for this purpose.

WAGO 750 Series Specifications

General

Protection Class	IP20
Bus Couplers	PROFIBUS, CANopen, Ethernet
Modules	Digital Input, Digital Output, Analog Input, Analog Output
Mounting	DIN rail mounting
Voltage Supply	24 V DC (typical)
Communication Protocol	Depends on the bus coupler (e.g., PROFIBUS, CANopen, DeviceNet, Ethernet)
Digital Input Channels	Varies by module (e.g., 8, 16 channels)
Digital Output Channels	Varies by module (e.g., 8, 16 channels)
Analog Input Channels	Varies by module (e.g., 2, 4, 8 channels)
Analog Output Channels	1, 2, 4 channels (depending on module)
Width	12 mm, 24 mm (typical module widths)
Number of Channels	Varies by module type
Current Consumption per Channel	Varies by module type