Topic: DMD0267
System Setup and Maintenance Overview
Initial System Setup
Configuring the
Hardware Watchdog Timer - Do-more CPUs contain a hardware watchdog
timer that is used to put the PLC into a safe mode if the operating
system in the CPU ever stops running for more than 2 seconds.
LED Definitions - Do-more CPUs
have two-color LEDs that are used to visually provide operational status
to the user.
Mode Switch Position Definitions
- the Mode switch on the front of the CPU is used to manually set
the operational mode of the CPU.
DIP Switch Definitions - the CPU's have a block of 8 DIP switches that are used to
perform various debug and reset operations.
Communication Port Pinouts - Do-more CPUs in the BRX series have one built-in serial port that supports both RS-232 and RS-485; the E variants additionally have one on-board 10/100Base-T Ethernet port. BRX series CPUs also have one POM slot that can accommodate a USB port, an RS-232 Serial port, an RS-485 serial port, or another 10/100 Base-T Ethernet port. Do-more CPUs in the DL205 and Terminator I/O series have one built-in USB port, one built-in RS-232 serial port; the E variants additionally have one on-board 10/100 Base-T Ethernet port.
Configuring the On-board Ethernet Port - the on-board Ethernet port of the CPU supports only TCP/IP protocol. The Ethernet port must have its TCP/IP configuration set to operate on the same network as the computer that is running Do-more Designer.
System Maintenance
Changing the On-board Battery - Do-more CPUs have an on-board battery that maintains the contents of the retentive memory any time the power to the system is lost. Follow the instructions for your specific CPU to change the battery.
Clearing the Network Configuration of the On-board Ethernet Port - there will be times when the network configuration needs to be cleared (or temporarily set to some known values). For example, the PLC is moved to a network with TCP/IP settings that make it unreachable with software, or the IP Address is unknown, or the IP address was entered incorrectly which also makes the CPU unreachable.