User manual

PD-1161 TMCL Firmware V1.19 Manual (Rev. 1.04 / 2012-NOV-19) 68
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Number
Axis parameter
Description
I6
absolute max. current (CS /
Current Scale)
The maximum value is 255. This value means 100% of the
maximum current of the module. The current adjustment is
within the range 0… 255 and can be adjusted in 32 steps (0…
255 divided by eight; e.g. step 0 = 0… 7, step 1 = 8… 15 and so
on).
The most important motor setting, since too high values might
cause motor damage!
I7
standby current
The current limit two seconds after the motor has stopped.
I168
smartEnergy current minimum
(SEIMIN)
Sets the lower motor current limit for coolStep™ operation by
scaling the CS (Current Scale, see axis parameter 6) value.
Minimum motor current:
0 – 1/2 of CS
1 – 1/4 of CS
I169
smartEnergy current down
step
Sets the number of stallGuard2™ readings above the upper
threshold necessary for each current decrement of the motor
current. Number of stallGuard2™ measurements per decrement:
Scaling: 0… 3: 32, 8, 2, 1
0: slow decrement
3: fast decrement
I171
smartEnergy current up step
Sets the current increment step. The current becomes
incremented for each measured stallGuard2™ value below the
lower threshold (see smartEnergy hysteresis start).
current increment step size:
Scaling: 0… 3: 1, 2, 4, 8
0: slow increment
3: fast increment / fast reaction to rising load
I183
smartEnergy slow run current
Sets the motor current which is used below the threshold
speed. Please adjust the threshold speed with axis parameter
182.
SG170
smartEnergy hysteresis
Sets the distance between the lower and the upper threshold
for stallGuard2™ reading. Above the upper threshold the motor
current becomes decreased.
SG181
stop on stall
Below this speed motor will not be stopped. Above this speed
motor will stop in case stallGuard2™ load value reaches zero.
V182
smartEnergy threshold speed
Above this speed coolStep™ becomes enabled.
T214
power down delay
Standstill period before the current is changed down to standby
current. The standard value is 200 (value equates 2000msec).
For further information about the coolStep™ feature please refer to the TMC262 Datasheet.
6.5 Using the RS485 Interface
With most RS485 converters that can be attached to the COM port of a PC the data direction is controlled
by the RTS pin of the COM port. Please note that this will only work with Windows 2000, Windows XP or
Windows NT4, not with Windows 95, Windows 98 or Windows ME (due to a bug in these operating
systems). Another problem is that Windows 2000/XP/NT4 switches the direction back to receive too late. To
overcome this problem, set the telegram pause time (global parameter #75) of the module to 15 (or more
if needed) by issuing an SGP 75, 0, 15 command in direct mode. The parameter will automatically be
stored in the configuration EEPROM.