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DL340 CPU Configuration

Page Contents:

DIP Switch Settings
Memory Type Selection Jumpers
Register Settings
Special Relays
Port 1 Address Selection
Setup Programming Examples

**DIP Switch Settings**
Switch	OFF State	ON State	Description
1	RAM	EEPROM or UVPROM	This switch should match the type of chip in the memory socket. You must set the jumpers also to properly configure the memory type.
2	Non-Retentive	Retentive	This switch determines if the internal relays 340-373 are set retentive.
3, 4, 5	BAUD SW3 SW4 SW5 300 OFF ON ON 600 OFF OFF ON 1200 ON ON OFF 2400 ON OFF OFF 4800 OFF ON OFF 9600 OFF OFF OFF 19200 ON ON ON 38400 ON OFF ON		These switches determine the baud rate for Port 1.
6, 7	MODE SW6 SW7 DirectNet Slave OFF OFF DirectNet Master OFF ON DirectNet Peer ON OFF Modbus® RTU Slave ON ON		These switches determine the protocol mode for Port 2.
8			NOT USED

**Memory Type Selection Jumpers**
Jumper Position	Memory Type
1	no chip (using RAM only) or EEPROM (write Protected)
2	EEPROM (write enabled)
3	UVPROM

**Register Settings**
Register	Function
R771	Port 2 Secondary Address (MSB)
R772	Port 2 Secondary Address (LSB)
R773	Port 2 baud rate. BAUD R773 300 1 600 2 1200 3 2400 4 4800 5 9600 6 19200 7 38400 8 9600 any other value
R774	Port 2 RTS Lead Time (x20ms)
R775	Port 2 RTS Lag Time (x20ms)
R776	Port 1 RTS Lead Time (x20ms)
R777	Port 2 RTS Lag Time (x20ms)

**Special Relays**
Special Relay	OFF Function	ON Function
C1072	Port 2 Parity NONE	Port 2 Parity ODD
C1076	Port 2 HEX Mode	Port 2 ASCII Mode
C1077	Port 1 HEX Mode	Port 1 ASCII Mode

**Port 1 Address Selection**
Rotary Dial	Function
SW3	Port 1 Address (LSB)
SW4	Port 1 Address (MSB)

SW3 is closest to the DIP switches.

When the FIXED/USER switch on the front of the CPU is set to FIXED then the address is set to 1.

NOTES

To set the address and baud rate of port 2 use the following code which sets the address=5 and the speed=9600.

    STR     C374
    DSTR    K6
    DOUT1   R773
    DSTR    K0
    DOUT1   R771
    DSTR    K5
    DOUT1   R772

When setting the MODBUS® address on Port 2, the address is entered in its DECIMAL form, with the two low order digits in R772 and the high order digits in R771. For example, to set the address to 24 (18 HEX) use the following code:

    STR     C374
    DSTR    K0
    DOUT1   R771
    DSTR    K24
    DOUT1   R772

MODBUS® is a registered trademark of Modicon, Inc.