Technology Option F01
08.2012
6SE7087-6QX70 (Version AN) Siemens AG
9-174
Compendium Motion Control
SIMOVERT MASTERDRIVES
Start position for synchronization
If you want to start the synchronization from a defined start position,
you must first approach the position in a positioning mode and stop the
drive at this point. You can then start the synchronization from speed
"0".
With the "offset setting" [837], you can perform the orientation on-the-fly
with reference to a synchronization marker after starting the
synchronization mode. Although the offset setting is already
implemented, it is not yet released for software version V1.2.
9.8.22
Help, my axis won't start!
If your positioning axis won't start, the cause may be one of the
following:
♦
The start command [STA] is not active or not wired correctly. Check
in n541.01 [809.7] whether the start command is correctly applied to
bit 2 of the positioning control word. A movement is always started
on a 0
→
1 edge of the start command.
♦
The start enable [ST_EN] is missing. Check in n541.03 [811.7]
whether the start enable is indicated in bit 10 of the positioning
status word. A missing start enable can have the following causes:
•
The start command [STA] is still set to "1". The start enable is not
activated until the start command is reset to "0".
•
The correct mode is not selected (see below)
•
A positioning warning is active A129...A255 (see display
parameter n540.26 [818.5] and the section entitled "Warnings,
faults"). Remedy the cause of the warning and acknowledge it
with a 0
→
1 edge of basic unit control bit 7 "acknowledge fault"
[ACK_F] [180] or with the "P" button on the PMU.
•
The "reset technology" [RST] command is active. Check bit 6 of
the positioning control word in n541.01 [809.7].
•
The "follow-up mode" command [FUM] is active. Check bit 5 of
the positioning control word in n541.01 [809.7].
♦
The velocity override is = 0. Check n540.11 [809.8].
♦
The velocity setpoint defined in the NC block = 0.
♦
The correct mode was not selected with [MODE_IN]. Check the
mode status [MODE_OUT] in n540.15 [811.4].
♦
An operating condition is missing (warning A130...A135). Check in
r550 [180.7] that control bits OFF1, OFF2, and OFF3 are set to "0"
and the inverter enable [ENC] is set to "1". You should also check
the present converter status in r000.
NOTE
