Hi everybody

I have plc S7-300 cpu 318-2dp , i need to make a new HMI to be connected to plc (the plc is old version) which can't be programmed in tia portal so i use a proxy plc feature in TIA portal V 15.1

I made all HMI programing and all are very good except S5time value to be modified or monitored through HMI it doesn't work at all .

I have to modify The plc program by using FC 40 to convert timer value to BCD , i have a lot of timers 

so if i use fc 40 for each timer it will make the program bigger and i have to use S5 timers.

Is there is any way to to monitor and modify timers values directly from HMI without convert function.

i use hmi comfort panel 12 

Thank you MR . Wizard 

the linear scaling is very helpful and i works very well

Thanks a lot again