Parker Products COMPAX-M /-S (L) - Manual (Page 168)

Operating Instructions COMPAX-M / -S
Process coupling using HEDA (Option A1 / A4)
168
8.6.4 Process coupling using HEDA (Option A1 / A4)
See also Page 185.
HEDA (SSI interface) can be used for synchronization of several axes with
simultaneous (
± 2.5 µs) processing of individual controller time slices.
The master (operating mode 1) transmits 2 synchronization words to the slave
axes, enabling them to synchronize. The slave axes (operating mode 2)
synchronize automatically. No response is transmitted from the slave axes to the
master.
The master only transmits to axis address 1. Therefore, all slaves must also be set
to address 1 (P250=1).
Acyclic communication between master and slave is not possible.
COMPAX XX00 as slave to transmit "Fast start" or as master
COMPAX XX60 as master or slave not when P212=3 and P212=4
COMPAX XX70 as master or slave only when P31=9 or 0
Max. 16 participants in the master/passive slave operating mode and max. 50m
cable length.
The units must be fitted with the O1 / A4 (COMPAX 1000SL) option. There must be
a terminating connector bus 2/01 on the last slave.
Parameter
No. Meaning Valid
from Default
value
P243 HEDA operating mode VP 0
P245* Assgn outputs O1 ... O8 to the HEDA bus imme-
diately 0
P246* Assgn outputs O9 ... O16 to the HEDA bus imme-
diately 0
P247 Max. average transmission errors VP 5
P248 Max. transmission errors VP 15
P249 Synchronization monitoring VP 10
P250 Unit addresses (in master – slave mode =1) VP 0
*In the HEDA master - HEDA slave operating mode (passive slave to COMPAX
master), P245=P246=0 is set.
No
. P243 P250 Operating
mode Description
0 Not
relevant = 0 Independent
single axis No coupling, no synchronization
0 0 = 1 ... 9 Slave on IPM 39
via HEDA
Coupled operation and acyclic
communication possible via HEDA
1 Bit
0="1"
(P243=1)
= 1 COMPAX as
master Master axis transmits synchronous
word and 7 words to address 1
2 Bit
1="1"
(P243=2)
= 1 Passive slave
to COMPAX
master Slave receives at address 1 (P250=1),
but does not send anything back
Note!
If HEDA coupling is activated and the master executes "Find machine zero",
this will result in a positional offset between master and slave.
You should therefore execute machine zero travel when the HEDA coupling
is deactivated.
39 The interpolation module IPM can also be used as a master, but only with
COMPAX XX00; COMPAX XX60, COMPAX XX70
Synchronization
and fast start via
HEDA:
Variant support:
Physical limits:
Hardware
requirements:
HEDA
parameters:
Operating modes: