MID-7604/7602 Stepper Power Motor Drive User Guide
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You can configure the MID-7604/7602 stepper drivers in a current reduction mode on a per-axis basis.
This configuration is useful to minimize motor heating when you are not stepping. With current
reduction enabled, the current decreases by 50% when no stepping has occurred for approximately
500 ms. DIP switch 5 controls current reduction on a per-axis basis. When this DIP switch is on, current
reduction is enabled. When this DIP switch is off, current reduction is disabled. The factory default
setting is current reduction enabled.
Table 4 shows the available settings for DIP switch 5.
Inhibit Input Polarity Setting
The MID-7604/7602 has a DIP switch that globally sets the polarity for the inhibit input for all axes.
DIP switch 10 on the axis 1 DIP switch bank controls this setting. Refer to Figures 1 and 3 for the
location of this switch.
The factory default setting of DIP switch 10 is active low. If the inhibit input is active, the axis is
inhibited and the yellow status LED (middle row) and red status LED (top row) illuminates for the axis.
Note
In older versions of the MID-7604/7602, the red status LEDs do not illuminate when the
yellow status LEDs illuminate. This behavior only occurs in newer versions of the MID-7604/7602.
Table 5 shows the DIP switch setting for the inhibit input polarity selection.
Table 4.
Current Reduction DIP Switch Settings
Switch Setting
Operation
Current reduction enabled
(factory default)
Current reduction disabled
Table 5.
Inhibit Input Polarity DIP Switch Settings
Axis 1 Switch Setting
Operation
Active high
Active low
(factory default)
5
O
N
5
O
N
10
O
N
10
O
N
