Is PLCLOGO binding Read Only?

I’ve mapped a parameter in a function block to a memory address on my LOGO PLC. Reading the value from the PLC using the PLCLOGO binding in OpenHAB works fine, but when I try to change the value using an input-card, the value is changed in OpenHAB, but never written to the PLC. Am I doing something wrong, or is the PLCLOGO binding in OpenHAB read only?