FDCO Transmit Signal

We have a requirement where At present we are using two PCBA for static switch control and RO1 as control. RO1 is giving 24 volts signal to one PCBA which is converting it to optical signal and giving it to another PCBA. This PCBA controls the static switch. Optical signal is required because of the isolation requirement. If we can use RDCO / FDCO transmitter for controlling static switch, it will make operation faster, reduce one PCBA and free up one DO. This way we can increase reliability. Can we program RDCO / FDCO through Codesys to give optic signal through control program? I need optic signal with fixed duty cycle and max 5 kHz frequency.