Rotary Switch

Overview

The two rotary switches located on the front panel of the TM3 CANopen bus coupler are used to set the CANopen bit rate and CANopen NodeID.

Default values on the rotary switches are:

0 for TENS
0 for ONES

(TENS) Set the bit rate/represents the tens numbered 0 to 120.

(ONES) Authorize to set the bit rate when set to not used position/represents the numbers 0 to 9.

Setting the Bit Rate

The TM3 CANopen bus coupler detects a new bit rate selection by the rotary switches only during power up. The bit rate is written to non-volatile memory.

Set the ONES rotary switch to any of the unnumbered positions (not used) to set a particular bit rate with the TENS rotary switch.

NOTE: Any modification of the rotary switch position during operational mode is not taken into account. The ERR LED flashes red. See status LEDs table.

Bit rate can also be set and verified via the web server. For more information, refer to the Modicon TM3 Bus Coupler Programming Guide.

To set the bit rate, follow the steps below:

Step	Action	Comment
1	Remove power to the bus coupler.	The bus coupler detects the changes only at the next power up cycle.
2	With a 2 mm or 2.5 mm slotted (flathead) screwdriver, set the ONES rotary switch to any of the unnumbered positions (not used). NOTE: Rotary switch is designed to be torqued normally by hand. Axial force must be inferior to 2 N.	Setting the rotary switch to any of these unnumbered positions prepares the bus coupler to accept a new bit rate.
3	With a 2 mm or 2.5 mm slotted (flathead) screwdriver, set the TENS rotary switch to the position that corresponds to your selected bit rate.	Use the bit rate selection table below to determine the position of the rotary switch.
4	Apply power to the bus coupler.	The bus coupler reads the rotary switch settings only during power up.
5	Wait for the RUN and the ERR LEDs to flash 3 times, then remain solid.	The bus coupler has written the new bit rate setting to memory.
6	Remove power to the bus coupler and set the CANopen address using the rotary switches, as described below in Setting the CANopen address.	The bit rate has been established for the bus coupler. It must be followed by the address setting to operate.

Bit-rate Selection Table

The following table shows the rotary switch positions and the bit rate:

Position TENS rotary switch	Bit rate
0	Not used
1	20 kbits/s
2	50 kbits/s
3	125 kbits/s
4	250 kbits/s
5	500 kbits/s
6	800 kbits/s
7	1 Mbits/s
8	Automatic bit-rate detection
9	250 kbits/s (default value)
10...12	Not used

NOTE: Setting the TENS rotary switch between 10 and 12 and unnumbered part will generate an error detected at the next power on.

CANopen Bit Rate Setting Example

The following figure shows an example when the bit rate is configured to 500 kbits/s:

(TENS) Set to 5 to configure the bit rate to 500 kbits/s.

(ONES) Set to the not used position to authorize the bit rate setting.

Setting the CANopen Address

The TM3 CANopen bus coupler address (from 1 to 127, decimal) is configured using the two CANopen address settings rotary switches.

WARNING
	UNINTENDED EQUIPMENT OPERATION Do not use an address outside of the specified range (from 1 to 127). Failure to follow these instructions can result in death, serious injury, or equipment damage.

To reset the CANopen bus coupler, remove power and provide a correct address before reapplying power to the bus coupler.

Set the CANopen address using the TENS rotary switch to represent the hundreds and tens digit and the ONES rotary switch to represent the units digit.

Carefully manage the addresses because each device on the network requires a unique address. Having multiple devices with the same address can cause unintended operation of your network and associated equipment.

WARNING
	UNINTENDED EQUIPMENT OPERATION Do not connect the CANopen cable and apply power to the TM3 CANopen Bus Coupler on network that is operational (other devices connected in an ongoing control scheme) unless you first set the appropriate, unique address for the Bus Coupler. Assure that unique CANopen addresses are assigned to the TM3 CANopen Bus Coupler, and that those addresses are also unique from all other devices connected to the network. Failure to follow these instructions can result in death, serious injury, or equipment damage.

WARNING

UNINTENDED EQUIPMENT OPERATION

Do not connect the CANopen cable and apply power to the TM3 CANopen Bus Coupler on network that is operational (other devices connected in an ongoing control scheme) unless you first set the appropriate, unique address for the Bus Coupler.
Assure that unique CANopen addresses are assigned to the TM3 CANopen Bus Coupler, and that those addresses are also unique from all other devices connected to the network.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

CANopen Address Setting Example

The following figure shows an example when the CANopen address is set to 115:

(TENS) Represents the tens, numbered 0 to 120, set to 110.

(ONES) Represents the numbers 0 to 9, set to 5.