HEIDENHAIN ITNC 530 - Trouble Shooting on the CC 424 (B)

18 – 298 HEIDENHAIN Service Manual iTNC 530
18.2.4 Trouble shooting on the CC 424 (B)
To find out, whether the connected encoder or the interface of the control is defective, the
interchange method can be used. Use the interface of a working axis for this purpose.
Example Error in X-axis
Example machine
parameters
Notes and
preliminary
action
 Use the motor encoder input of a functioning axis.
(The firmly assigned PWM output must be connected as unassigned PWM outputs might not
be active, depending on so-called single-speed and double-speed outputs.)
 Encoders can only be switched within the main DCB and the auxiliary DCB!
 The firmly assigned PWM output must also be exchanged!
 Axes in master-slave torque control are only permitted at X15/X17 or X16/X18.
When using a CC 424 (B) with 8 and 14 control loops starting with NC software 34049x-03,
master-slave torque axes also function on X19/X80 or X20/X81.
 The same PWM frequency must be set for the axes to be switched!
Block diagram
Caution
When troubleshooting do not connect obviously defective devices (e.g. motor encoder with
short circuit caused by ingress of moisture) to other interfaces of the control.
MP 100.x = CZYX (X = 1st axis, Y = 2nd axis, Z = 3rd axis, C = 4th axis)
MP 120.0 = 51 (X-axis on PWM output X51 and speed input X15)
MP 120.1 = 52 (Y-axis on PWM output X52 and speed input X16)
MP 120.2 = 53 (Z-axis on PWM output X53 and speed input X17)
MP 120.3 = 54 (C-axis on PWM output X54 and speed input X18)
Note
Always switch both the cable and the interface assignment by machine parameter!