Toshiba PROSEC T1-16S PLC User's Manual - CTi Automation
Toshiba PROSEC T1-16S PLC User's Manual - CTi Automation
Toshiba PROSEC T1-16S PLC User's Manual - CTi Automation
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5. Operating System Overview<br />
5.1 Operation modes<br />
The <strong>T1</strong>-<strong>16S</strong> has three basic operation modes, the RUN mode, the HALT mode and<br />
the ERROR mode. The <strong>T1</strong>-<strong>16S</strong> also has the HOLD and RUN-F modes mainly for<br />
system checking.<br />
64 <strong>T1</strong>-<strong>16S</strong> User’s <strong>Manual</strong><br />
6F3B0253<br />
RUN: The RUN mode is a normal control-operation mode.<br />
In this mode, the <strong>T1</strong>-<strong>16S</strong> reads external signals, executes the user program<br />
stored in the RAM, and outputs signals to the external devices according to<br />
the user program. It is in the RUN mode that the <strong>T1</strong>-<strong>16S</strong> performs scans the<br />
user program logic, which is the basic operation of a <strong>PLC</strong>.<br />
Program changes and EEPROM write are possible while the <strong>T1</strong>-<strong>16S</strong> is in<br />
the RUN mode. Refer to section 6.9.<br />
HALT: The HALT mode is a programming mode.<br />
In this mode, user program execution is stopped and all outputs are<br />
switched off.<br />
Program loading into the <strong>T1</strong>-<strong>16S</strong> is possible only in the HALT mode.<br />
For the standard <strong>T1</strong>, program changes and EEPROM write are possible only<br />
when the <strong>T1</strong> is in the HALT mode.<br />
ERROR: The ERROR mode is a shutdown mode as a result of self-diagnosis.<br />
The <strong>T1</strong>-<strong>16S</strong> enters the ERROR mode if internal trouble is detected by selfdiagnosis.<br />
In this mode, program execution is stopped and all outputs are<br />
switched off. The cause of the shutdown can be confirmed by connecting<br />
the programming tool.<br />
To exit from the ERROR mode, execute the Error Reset command from the<br />
programming tool, or cycle power off and then on again.<br />
HOLD: The HOLD mode is provided mainly for checking the external I/O signals.<br />
In this mode, user program execution is stopped, with input and output<br />
updating is executed. It is therefore possible to suspend program execution<br />
while holding the output state. Moreover, a desired output state can be<br />
established by setting any data by using the programming tool.<br />
RUN-F: The RUN-F mode is a forced RUN mode provided for program checking.<br />
This mode is effective when using the expansion I/Os.<br />
Deferent from the normal RUN mode, the RUN-F mode allows operation<br />
even if the registered I/O modules are not actually mounted.<br />
<strong>CTi</strong> <strong>Automation</strong> - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net
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