Operation & Software Manual
94
Direct Drives & Systems
Chapter C: System functions ETEL Doc. - Operation & Software Manual # DSC2P 903 / Ver. F / 3/6/05
Example:
Motor: I
m
peak = 7.96 A
I
m
continuous = 3.196 A
t= 5 s
I
over
current = I
m
peak + ~20% = ~1.2 · I
m
peak = 9.55 A
Controller: DSC2P1
21xx I
max
controller = (M82 / 100) = 12,5 A
12.4.3 Safety signals on DIN and DOUT
When a motor is integrated in a complex machine and an error is detected in the controller, it is important to
send a message about it to the rest of the machine so that the other elements can adequately react. This is
possible with the digital outputs (the DSO-HIO optional board's outputs are not concerned). Parameter K37
allows the user to select the digital outputs to be used. When an error occurs, the outputs selected by
parameter K37 change from the logical value ’1’ to ’0’. For example, DOUT1 can be connected to a relay which
short-circuits the motor phases in case of error, making a magnetic brake. The outputs that have to be
activated in case of error are chosen via the binary value of parameter K37.
The number of digital outputs is different from a position controller to another. Here is a table giving the number
of digital outputs present on each position controller (refer to the corresponding ’Hardware Manual’ for more
information):
Caution: On the DSCDM, the digital inputs and outputs are on the same pin. The pin must be selected in
order to have an input or an output. It is NOT possible to have both on the same pin. To use
a pin as a digital input, the bit corresponding to this input MUST be equal to 0 in parameter K171.
Example:
To activate DOUT3 of the DSC2P or DSC2V, parameter K37 has to be set to 4, because it corresponds to
0000000000000100 binary. Several outputs can be activated simultaneously, for example, DOUT2 and
DOUT1 are selected with value 3 (0000000000000011 bin).
On the contrary, parameter K33 switches the controller in error mode by adding the number 0 and switches off
the power if DIN1 digital input is not set to 1. The error displayed on the LCD screen shows POWER OFF/ON
Available on DSC2P DSC2V DSCDP DSCDL DSCDM
DSC2P / DSC2V DOUT # 4321
DSCDP / DSCDL DOUT # --21
DSCDM DOUT # -321
K37
Bits# 3 to 15
not used
Bit# 3
DOUT4
Bit# 2
DOUT3
Bit# 1
DOUT2
Bit# 0
DOUT1
3 0 0 0 0 0 0 0 0 0 0 0 0 0 0011
4 0 0 0 0 0 0 0 0 0 0 0 0 0 0100
Decimal Binary
K83
955, 32768⋅
12 5,
-------------------------------
25000==
K84
3.196
12 5,
-------------
100⋅
2
0.8192 536=⋅
=
K85 9830 5
7.96
12 5,
------------
100⋅
2
3.196
12 5,
-------------
100⋅
2
167000000=–
⋅⋅=
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