ppms: improve status and temperature

- treat unknown status values similar to status 0
- wait at 10 K when cooling below
- better error message

Change-Id: Ic07826e31f36abc72ee5d72da001fb1f3d2fe8aa
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/23121
Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

secop_psi/ppmswindows.py

@@ -58,7 +58,8 @@ class QDevice:
         if err == 1:
             # print '<done'
             return "OK"
-        raise Error(args[2].value.replace('\n', ' '))
+        raise Error('%s on cmd "%s" %s' % (args[2].value.replace('\n', ' '), command,
+                                           getattr(args[2], 'value', 'noreply')))
 
 
 if __name__ == "__main__":  # test only