Specifications
9-42
Remote I/O Servers
Remote I/O Servers
www.m o x a . c o m e - m a i l : i n f o @ m o x a . c o m
9
Self-Diagnostic Function for Digital Output Channels
ioLogik 4000 servers are equipped with a built-in watchdog timer
that monitors the Modbus communication status. If Modbus
communication between the remote I/O server and a host computer
or a PLC is interrupted, the watchdog can activate safe status to reset
all output channels to a user-defined state. The watchdog ensures the
safety of field operations if there is a problem with communication.
Digital output channels may be set to On, Off, or Hold Last Status
when safe status is activated. Analog output channels may be set
to Fixed Safe Value, Low Limit, or High Limit when safe status is
activated. For example, if you set the safe status of a DO to “off,” then
the DO will automatically turn off if Modbus communication times out.
Remote Configuration
ioAdmin is a powerful, Windows-based configuration and management
tool. You may use ioAdmin to modify the IP address, update
communication parameters, and configure all other settings easily. In
addition, ioAdmin can be used to configure ioLogik I/O servers from a
remote host. This means that ioLogik servers may be configured from
anywhere over the Ethernet, which may help reduce operating costs.
I/O Testing
ioAdmin provides a test function to verify operation of digital and analog output channels.
Traditionally, users needed to use a meter to check the status of each sensor. With ioLogik
servers, they may use ioAdmin’s intuitive software interface to test digital and analog output
channels.
Digital output: Use the switch to test the on/off status.
Analog output: Use the slider to test the voltage output.
Safe Status with Communication Watchdog Timer
The M-2402, 2403, 2404, and 2405 modules include a self-diagnostic
function to guarantee that the digital output signal is monitored
electronically. The hardware-monitored status will be written to the
logic system. You will obtain the actual digital output status over the
network when the software sends a command to the module. This is
all done internally; configuration is not required.