Operating Via Communication Links - GE ASTAT XT QT 0008U Series User Manual

8.16 Operating via Communication Links

Notes:
• In order to operate via communication, either Modbus (standard) or Profibus (optional) or DeviceNet
(optional) optional PCBs must be installed and wired properly.
ASTAT-XT must be properly grounded.
•
• ASTAT-XT must be programmed to enable control (not only monitoring). Refer to section 4.7.9 and
4.7.10 page 42 for programming.
Make sure that after programming, Control Supply voltage is disconnected and reconnected so that
•
the communication settings will take affect.
ASTAT-XT will toggle between communication commands and local commands UNLESS switches A or
•
B are opened.
o Switch A and B each overrides a START command coming from the communication channel.
o Switch A can be used as an immediate stop that prevents an unwanted remote start coming
from communication.
o Switch C can be used as a local SOFT START.
o Switch B can be used as a local SOFT STOP.
WARNING Beware!
ASTAT-XT must be grounded at all times.
When testing the ASTAT-XT control/communication it is possible to use the control
module only without the power section (ASTAT-XT 85A and up).
The control module MUST be properly grounded to avoid danger of electrical shock!!
• Application diagrams
70