Safety Monitoring Function; Monitoring Mode - Mitsubishi Electric MELFA CR750 Series Instruction Manual

4 Safety monitoring function

4.3 Safety monitoring function
4.3.1

Monitoring mode

(1) Overview
The monitoring mode defines the details of monitoring for the safety monitoring function (SLS/SLP/STR).
Specify the mode using the controller mode and the DSI signals.
(2) Specifying the monitoring mode
The monitoring mode is specified by a state of the controller mode (AUTOMATIC/MANUAL) and ON/OFF of
the DSI signals. The correspondence of the state of the controller mode and DSI signals to the monitoring
mode is specified as shown below.
Table 4-1 Correspondence of the state of the controller mode and DSI signals to the monitoring mode
Monitoring mode
Mode 1
Mode 2 Mode 2 (A)
Mode 2 (B)
Mode 3
Mode M
*1) When "-1" is specified for the input signal number of DSI signal, the DSI signal is disabled.
*2) When the controller mode is set to MANUAL, the state of DSI signals are not referred to.
The following illustration shows an example of monitoring mode changes due to the state changes of the
controller mode and DSI signals.
(*1) After the state of the controller mode and a DSI signal changes and the reaction time specified by the
parameter SFREACT passes, the monitoring mode is changed to the specified one.
(*2) When the controller mode is set to MANUAL, the monitoring mode is not changed from Mode M even if
the state of DSI signal changes and the reaction time passes.
(*3) When the state of a DSI signal changes and returns to the former state before the reaction time passes,
the monitoring mode is not changed.
(*4) When the state of a DSI signal changes and another DSI signal changes before the reaction time
passes, the elapsed time until then is reset, and the monitoring mode is changed after the new reaction
time passes.
4-22 Safety monitoring function
Controller
mode DSI1
AUTOMATIC ON
ON
*1)
Disable
*1)
Disable
OFF
OFF
ON
*1)
Disable
OFF
*2)
MANUAL -
DSI signal
DSI2
ON
*1)
Disable
ON
*1)
Disable
ON
*1)
Disable
OFF
OFF
OFF
*2)
-