70 • Application diagrams
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!!
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