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Manual PD4-C (USB)
9 Operating modes
Version: 1.4.1 / 22.07.2016 / FIR-v1626
61
Note
For the mode 35 it is not necessary to switch the DS402 Power state machine up to the status
"Operation Enabled", the status "Switched on" is sufficient.
9.6 Clock/direction mode
9.6.1 Description
This mode is equivalent to the velocity mode but uses pules of two input pins as target.
The analogue mode is only controlled by the "enable"-input: as long as the "enable"-input is not set to
logical "high" level the motor won’t start driving.
Note
The limit switches - and therefore the tolerance bands - are active in this mode. See chapter
"Tolerance bands of the limit switches" for further information about the limit switches.
9.6.2 Activation
The activation is not done via the object dictionary but a DIP-switch. For the settings of the switches
see chapter "" "DIP switches".
9.6.3 General
The following data apply to all sub modes of the clock/direction mode:
•
The maximum frequency of the input pulses are limited at 1MHz, the ON-part is not allowed to get
shorter than 200 ns.
t
min. 1µs
(max. 1MHz)
min.
200ns
clock
input
•
The scaling of the steps is done via the objects 2057
h
and 2058
h
. The following formula is applied:
step width per pulse =
2057
h
2058
h
By default the value for "step width per pulse" is "512", which is equal a full step per pulse. A half
step is the value "256", a quarter step accordingly "128" and so on.
Note
During a change of direction it is necessary to let the time of 35µs lapse away before applying a
new clock.
9.6.4 Status word
The following bits in object 6041
(status word) have a special function: