Parker Products COMPAX-M /-S (L) Error handling, Error messages, Synchronizing, Process values

Interfaces

Unit hardware

Error handling

Process coupling using HEDA (Option A1 / A4)

	1st unit: Master	Slave
Coupling of several cams with the	COMPAX XX70	COMPAX XX70
same time base and separate master	P184=42 (time base)	P188=42
or slave oriented label synchronization	P188=42	P143s=P143M
(see above)
Linking of several cams with the same	COMPAX XX70	COMPAX XX70
time base and absolute zero drift	P184=43 (scaled	P188=43
between the axes due to the transfer of	master position)	P143s=P143M
a position value (see above)	P188=43

Only position signals can be completely restored following HEDA transmission errors . When transmitting velocities, transmission errors can lead to drift tendencies between the axis positions. For this reason use of the position values is preferred.

Connector	assignment / cable
Technical data

Error messages:	HEDA transmission or synchronization errors are errors E76, E77 and E78.
E76:	Synchronization is interrupted with E76, therefore an alignment is implemented
	whereby the process position value is aligned in such a manner that a position leap
E77/E78:	does not occur.
	With E77/E78, the slave attempts to reach the new undisturbed process position
	value in order to maintain the reference system.
	Transmitting "VC" interrupts the synchronization.
Note!	Only activate "VC" when the unit is switched off.
	When working with the user terminal BDF2, "VC" is transmitted when the
	"Parameter edit" menu is exited.
Transmission error	Position values / position (P184=40/43/44/45):	linear interpolation using old
procedure:	Velocity values / frequencies (P184=42/46):	values
		retains old value
Synchronizing	In cases when P188>0 on the master side, a fixed delay in the associated process
process values:	value is implemented, amounting to a total of 2 ms. This ensures that the master
	waits until all axes have received the process value. This ensures that all axes,

including the master, continue to process the new nominal values simultaneously.

Note: ♦ Except for fast start, no additional I/O's are sent.

♦There can be only one master on the bus!

Note: ♦ The position values for P184=44 and P184=45 are derived independently of the current positioning operating mode (normal, continuous, reset). They are obtained from the nominal position value and the actual position value and made available in 24-bit format, as if with counter channels. This avoids jerky changes in the start torque (in continuous mode) or when reading the end of the curve (in reset mode). Only the lower 24 bits of these values are transmitted, consisting of the resolver value and maximum 256 motor revolutions.

The required cable types are listed on Page 63.

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Configuration
Positioning and	control functions
Optimization	functions
Interfaces
Accessories /	options
Status
Parameter
Error list