User guide

Hardware
890 USE 108 00 August 2001 29
Memory Protect The memory protect switch is the top switch; it serves two purposes:
If on, it prevents a programming panel from overwriting the configuration or user
logic
If off, it allows configuration and user logic changes. It also determines whether
or not the controller should read the configuration and user logic from an
EEPROM auxiliary memory card inserted in the EEPROM socket. This occurs
only at power-up.
This is the mem prot switch.
Communication
Parameter
The communication parameter switch (the bottom slide switch) is used to specify
whether you want to use the default communication parameters on Modbus port 1
or the previously configured and saved communication parameters. (See MODBUS
Port Parameters (2-Position Slide Switch), p. 71.)
mem prot
ON
OFF