SICK MITSUBISHI ELECTRIC MELSEC iQ-F FX5, Руководство пользователя, Страница: 78 / 176

76
4 FUNCTIONS
4.7 Bypass
4.7
Bypass
This function forcibly turns ON the outputs of an FX5-SF-MU4T5 for up to 60 seconds while the inputs of an FX5-SF-8DI4 turn
ON, by connecting the inputs of the FX5-SF-8DI4 and a logic path of FX5-SF-MU4T5 with OR link.
Setting method
Set the rotary switch of an FX5-SF-8DI4 to '8'.
Sensors that can be connected to an FX5-SF-8DI4 are as follows.

: Connectable,

: Not connectable
Operation
■
INPUT A rotary switch of an FX5-SF-8DI4 is set to '8'
While I0 and I1 of an FX5-SF-8DI4 turn ON, Q0 and Q1 of an FX5-SF-MU4T5 are forcibly turned ON for 60 seconds.
■
INPUT B rotary switch of an FX5-SF-8DI4 is set to '8'
While I4 and I5 of an FX5-SF-8DI4 turn ON, Q2 and Q3 of an FX5-SF-MU4T5 are forcibly turned ON for 60 seconds.
Considerations
• Do not wire I2, I3, I6, and I7 of an FX5-SF-8DI4. They are not used.
• While the bypass function is enabled, the safety outputs of an FX5-SF-MU4T5 are ON. During bypass operation, make
sure that there is no danger to people, parts of the machine, or system.
• A bypass signal should be created using a dual-channel key switch (open contact).
• The bypass function should only be activated by a key switch with an automatic reset with two levels, or by two input
signals that are independent of each other, such as two position switches.
• Using organizational measures, ensure that a key switch for the bypass function is actuated one time in a certain interval.
This is necessary so that the FX5-SF-MU4T5 can identify an error condition of the key switch for the bypass function, or an
error condition of its connection cable. The interval should be defined to suit the specific case dependent on the application.
• Constantly check if the bypass function can be enabled and disabled in the operation mode which was set for the bypass
function.
• A key switch for the bypass function should be actuated in the place where the entire hazardous area can be surveyed.
• A key switch for the bypass function should not be handled in a hazardous area.
• When an error occurs, the FX5-SF-MU4T5 automatically ends the bypass function.
• A safety device is disabled by the bypass function; therefore, the bypass function should only be consciously activated by
an operator in the place where the entire hazardous area can be surveyed.
FX5-SF-8DI4
(Program) Inputs and sensors Description Input (I0 to
I3) Input (I4 to
I7)
8 : Potential free contact Dual-channel equivalent N/C contact (with
cross-circuit detection)
 