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80990B_MHW_CAN-IO_12-2016_ENG
Configurations
CAN address
Set the node number of the CAN-IO module with the switch
and dials.
The valid addresses range from 1 to 128.
Attention
: there cannot be two devices (nodes) with
the same address on the CAN bus
x100 x10 x1
ON
Figure 17 - Address switch and dials
To set an address, proceed as follows:
1. Use switch 2 to select the hundreds (OFF = 0, ON = 1).
2. Use the dial x10 to select the tens (from 0 to 9, A – F
positions are not valid).
Attention: selecting position A starts the
transmission speed change procedure
3. Use dial x1 to select the units (from 0 to 9, A – F positions
are not valid).
Every change in node number generates a restart of the card
with the new address acquired.
Examples of addresses
Indirizzo
Switch
Dial x10
Dial x1
8
OFF
0
8
73
OFF
7
3
125
ON
2
5
Setting the transmission speed
The factory configuration envisages a transmission speed
of 500 kbit/s.
This speed can be changed from 10 kbit/s to 1000 kbit/s
using the two 16-position dials x1 and x10 used to set the
CAN address of the CAN-IO module.
The length of the bus network influences the maximum speed
reachable, as shown in figure 18.
All the bus network devices have to operate at the same
speed.
1000
Velocità (kbit/s)
Lunghezza bus CAN (m)
10.000
1000
200
100
40
10
0
500
200
100
50
20
10
5
Figure 18 - CAN bus max transmission speed
The possible speed settings are:
Dial position
x10
Dial position
x1
Transmission
speed
A
0
1000 kbit/s
A
1
800 kbit/s
A
2
(pre-set) 500 kbit/s
A
3
250 kbit/s
A
4
125 kbit/s
A
5
100kbit/s
A
6
50 kbit/s
A
7
20 kbit/s
A
8
10 kbit/s
To change the transmission speed, proceed as follows:
1. Set dial x1 to the position corresponding to the
transmission speed required.
The operation of the LEDs of the CAN bus does not
change.
2. Set dial x10 to position A.
The green LED Is permanently on, the red LED is off.
3. The CAN-IO module restarts.
Wait for about 10 seconds, until the green and red LEDs
start to flash.
4. Reset dial x10 to the ten of the node number.
5. Reset dial x1 to the unit of the node number.
6. The CAN-IO module restarts. Wait 10 seconds.
The transmission speed has been changed.
Example
To set the transmission speed at 250 kbit/s in a CAN-IO
module with an address (node number) of 27, take the
following steps:
1. Place dial x1 on 3.
2. Place dial x10 on A.
3.
Wait for both the green and red LEDs to flash and place
the dial x10 on 2.
4. Place dial x1 on 7.
5. Wait for 10 seconds until the CAN-IO module restarts.
Transmission speed can also be changed via software. In this
case, sent an SDO command, followed by a reset with an on/
off sequence of the CAN-IO module.
