FB_TON

Description Function Block

The FB_TON function block is used to implement a switch-on delay. A logic 1 at the bTonIn input is extended by the set time forwarded to the output. If the input is set to 0 again before the delay time is reached, then the output is not switched on.

Table 28. VAR_INPUT

Name	Data Type	Initial Value	Description, Parameter Values
`bTonIn`	`SAFEBOOL`	`FALSE`	1st input channel: The Negation command can be used to specify whether a normally closed contact (safe state is requested for logic 0) or a normally open contact (safe state is requested for logic 1) is linked to this input.
`tSwitchOnTime`	`SAFETIME`	`TIME#0ms`	Switch-on delay time For the EL6900 controller, the time base of `tSwitchOnTime` is 100 ms. The minimum value is 1 * 100 ms = 0.1 seconds; the maximum value is 6000 * 100 ms = 600 seconds. With the EL6910/EK1960 controller, the time base is determined automatically: If the value of `tSwitchOnTime` is divisible by 10, then the time base of 10 ms is selected. The minimum value is 1 * 10 ms = 0.01 seconds; the maximum value is 60000 * 10 ms = 600 seconds. If the value of `tSwitchOnTime` is not divisible by 10, then the time base 1 ms is selected. The minimum value is 1 * 1 ms = 0.001 seconds; the maximum value is 60000 * 1 ms = 60 seconds.

Name

Data Type

Initial Value

Description, Parameter Values

bTonIn

SAFEBOOL

FALSE

1st input channel: The Negation command can be used to specify whether a normally closed contact (safe state is requested for logic 0) or a normally open contact (safe state is requested for logic 1) is linked to this input.

tSwitchOnTime

SAFETIME

TIME#0ms

Switch-on delay time

For the EL6900 controller, the time base of tSwitchOnTime is 100 ms. The minimum value is 1 * 100 ms = 0.1 seconds; the maximum value is 6000 * 100 ms = 600 seconds.

With the EL6910/EK1960 controller, the time base is determined automatically:

If the value of tSwitchOnTime is divisible by 10, then the time base of 10 ms is selected. The minimum value is 1 * 10 ms = 0.01 seconds; the maximum value is 60000 * 10 ms = 600 seconds.
If the value of tSwitchOnTime is not divisible by 10, then the time base 1 ms is selected. The minimum value is 1 * 1 ms = 0.001 seconds; the maximum value is 60000 * 1 ms = 60 seconds.

Table 29. VAR_OUTPUT

Name	Data Type	Initial Value	Description, Parameter Values
`bTonOut`	`SAFEBOOL`	`FALSE`	1st output channel: The safe state corresponds to logic `0`.