User’s Manual 9
With suitable settings in the following registers we can also choose the source of adjustment and limit
the range of the output current loop:
40019
40019
Select an adjustment
source
0 = from trimmer, 1 = from
Modbus, 2 = Modbus +
trimmer for fine tuning (+/-
12.5%)
-
By setting the register to 0 the MIN, MAX values are only acquired by the trimmers.
-
By setting the register values to 1 the MIN, MAX values are only read by the following registers:
40004
40004
MAX - Max. PWM value (0-
8191) value that can be set
Writing max. PWM value
40005
40005
MIN - Min. PWM value (0-
8191) value that can be set
Writing min. PWM value
-
By setting the register to 2, the MIN, MAX values are read by the above registers and the trimmers
can be used for fine /- 12.5% in relation to the value set in the register.
The buttons (except the UP button) and the RAMP and RESET trimmers are no longer read. Only the
MIN and MAX trimmers and the analog input selected with the UP button are read, this is to minimize
the response time between input and output variations as far as possible.
To change mode, move SWC switch SW1, then turn the device off and on again.
If the SWC switch isn't installed on the board, DIPOT can only function in the normal operating mode.
Depending on the DIPOT version, you may have an RS485 communication interface or CANBUS
interface isolated from the I/O and internal logic circuits; this results in high immunity to transient voltages
and eliminates problems caused by differences in the input voltages of the devices connected by bus.
This is particularly useful for long connections, in environments prone to disturbance, or where there is
no guarantee of equipotential grounding between devices (e.g. direct connection to a PC).
When initially setting up the device you can use the serial port on 3.5 mm stereo jack connector
J6.
This
serial port is non-isolated (unlike those on connector
J4
) and can be configured as RS485 or RS232
using
SWD
dip 3. If it is setup as interface RS485 a termination resistor can be used (as required by
standard TIA/EIA-485) to close
SWD
dip 1.
The line termination must not be switched in if interface RS232 is selected, or the serial port will
malfunction.
The baud rate of the port can also be set (
SWD
dip 4).
In the versions with isolated RS485 (
E6102094300xx
and
E6102094301xx)
serial port of connector
J4
is shared with connector
J6
. Use
SWD
dip 2 to select which port should be used. The serial ports on
J4
and
J6
cannot operate simultaneously.
If the serial port is used on connector
J6
, disconnect the female connector on
J4.
Use
SWD
dip 2 as follows, to select which port will be used:
If
SWD
-2 is ON, the serial will be available on connector
J4
(RS485 isolated with baud rate
selected by
SWD
-4).
