Multifunction I/Os

A total of four adjustable slots are available for configuring the operation modes. A slot is a certain number of inputs and outputs. For each slot a maximum of one module (DI, DIO, ENC, CNT or PWM) can be assigned, which in turn determines the operation mode for the respective slot. A module is therefore a function that these inputs and outputs can assume. The current module configuration is listed in TwinCAT under the CX7028 interface. Note that the CX7028 interface for controlling the multifunction I/Os has its own CPU and the CX7028 interface is not displayed or does not work under TwinCAT if the power supply (Up) is not connected.

Modules can be assigned to a specific slot with the button < or removed again with x. There is a choice of different modules depending on the slot used. The module used by each slot is listed in the following.

Cycle time for multifunction I/Os

Communication to the multifunction I/Os is monitored with a fixed watchdog of 100 ms. This means that the cycle time for the multifunction I/O must be faster than 100 ms.

Slot 1:

When using slot 1, inputs 1, 2 and (*3) as well as outputs 1 and 2 are configured.

• ENC (incremental encoder mode). 2 x digital input for 250 kHz encoder signal, 2 x encoder digital output.
• CNT (counter mode). 1 x counter digital input 100 kHz, 1 x digital input as up/down counter 20 kHz, 2 x counter digital output.
• DIO_2x (digital inputs and outputs). 2 x digital input, 24 V DC, filter 3 ms, type 3, 2 x digital output, 24 V DC, 0.5 A, 1-wire technique.

*) Input 3 is only available in incremental encoder mode. If the level is high, the value of the incremental encoder can be latched or the counter reset.

Slot 2:

When using slot 2, inputs 3 and 4 as well as outputs 3 and 4 are configured.

• DIO_2x (digital inputs and outputs). 2 x digital input, 24 V DC, filter 3 ms, type 3, 2 x digital output, 24 V DC, 0.5 A, 1-wire technique.
• PWM_DI_2x (PWM signal mode). 2 x digital input, 24 V DC, filter 3 ms, 2 x digital output configured for PWM signal.

Slot 3:

When using slot 3, inputs 5 and 6 are configured.

Slot 3 contains only one module and therefore cannot be configured differently. The module supports 2 x digital input, 24 V DC, filter 3 ms, type 3.

Slot 4:

When using slot 4, inputs 7 and 8 are configured.

• AI_2x (analog signal mode). 2 x digital input configured as analog input 0 to 10 V, 12 bits
• DI_2x (digital input). 2 x digital input, 24 V DC, filter 3 ms, type 3