
6. The SPEL+ Language
6.20 Special Tasks
Each task of SPEL+ pauses by Pause input or Safety Door open and stops by Emergency
Stop or Error. Therefore you cannot create a system that monitors the whole system.
RC90/RC180 controller is designed to use upper level PLC or PC to monitor the whole
system.
However, you may require a system that continues at Pause input or Safety Door open and
need to handle the Emergency Stop or error with the controller.
You can execute a task that continues at Pause input or Safety Door open by specifying
NoPause or NoEmgAbort task type when executing a task using Xqt.
These special tasks are useful tasks but may reduce the safety of the system by using them
improperly.
Be sure to understand the followings when using these tasks.
6.20.1 Precautions to Use the Special Tasks
CAUTION
Forced Flag
Specify Forced flag in the I/O output commands such as On/Off command to enable On/
Off of the I/O outputs during Emergency Stop, Safety Door open, and error.
Do not connect external equipment that operates mechanically such as actuator to the I/O
output that specifies Forced flag. Connecting external equipment may cause serious
safety problems and operate the external equipment during Emergency Stop, Safety Door
Open, or error occurrence.
Forced flag is designed to be specified for I/O outputs connected to external equipment
without mechanical motion such as status display LEDs.
NoEmgAbort Task
When Emergency Stop or error occur, finish the task promptly after completing the error
handling.
If you do not complete the NoEmgAbort task, the controller does not change to Ready
status and you cannot cancel the Emergency Stop or the error. You cannot execute Reset
command from the NoEmgAbort task to cancel the Emergency Stop or the error
automatically.
NoEmgAbort task is designed for I/O process without motion and communication with
external device using the Ethernet. Therefore there are commands such as robot motion
commands that cannot be executed in the NoEmgAbort task. An error occurs if you use
these commands. The list of these commands are in the next section.
For details, refer to EPSON RC+ 5.0 Online Help or Xqt in SPEL
+
Language Reference.
EPSON RC+ 5.0 (Ver.5.4) User's Guide Rev.4 183
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