I not have any experience using this address 50.
it looks everybody can upload/download the plc,
On your statement during uploading actually downloading the PLC setting.
After download you need restart the PLC by power down for PLC to take effect.
present the HSC not active
request shut down for download the PLC setting.(if you program not alter)
better upload first and compare with your document
if you want to simulate high or low frequency on display it's not meaning anything.
Better you use PULSE injector to your PLC input it more better approach
it looks everybody can upload/download the plc,
On your statement during uploading actually downloading the PLC setting.
After download you need restart the PLC by power down for PLC to take effect.
present the HSC not active
request shut down for download the PLC setting.(if you program not alter)
better upload first and compare with your document
if you want to simulate high or low frequency on display it's not meaning anything.
Better you use PULSE injector to your PLC input it more better approach