Prosoft Modbus Communication

I am using modbus communication module MVI56E-MCMR in communicating with another PLC(my plc is Master) and DCS(my plc is Slave).
I am asking if it is possible to send data to " the read " Database of the MVI56E-MCMR from my PLC that to be sent to the DCS Later.

Note that i can not send it to the write database because the DCS database it will read from word lay in my read database

Thank You in advance

I'm not clear on the question.

MVI56E-MCMR is an in-rack module. Since DCS is the slave, right? you have to trigger the write to the DCS from your PLC.

Thanks alot