Hi all, I use CP1L-20 + CP1W-CIF11 to communication with E5CN (modbus) Port 1: Serial gateway, standard (9600,1,7,2,e) --> corrected (9600,1,8,1,n) (parity as n/o/e same as E5CN side) D32200= #0001 (Slave address) D32201= #0003 (Function: Read) D32202= #0004 (Bytes of Comm. Data) D32203= #0000 (Read PV) D32204= #0001 (1 register) --> corrected #0002 A641.00=ON The result is nothing happenning: COMM LED not flash, A641.00 always ON, nothing in result area Please help me. (Note: I tested in Compoway/F mode using FB --> OK)