273Chapter 11RS-232C CommunicationCommand format: Fixed LengthCommunication direction Command / DescriptionFrom external device to PV310 % G ? ? n n n n CR??: 01 to 99 (Specify the number of the target checker in 2-digit form)nnnn: 0001 to 0255 or 001 to 0255 (Specify edge threshold in 4-digit form)nnnn :0001 to 0255: Unused digits are filled with '0'.nnnn :0001 to 0255: Unused digits are filled with 'Blanks'.Response: Normal (at the endof specifying the number ofcommand digits)% G ? ? n n n n CRThe same command as the sending command from external device to PV310 istransmitted.Response: Error 1 % U CRCause:Command in the unspecified form or not provided was received.Examples:- %G1,80 CR (any other checker number than 01 to 99 was specified)- %B01,80 CR (not provided command)Response: Error 2• ERROR signal = “ON”• Error Code: E0177 isdisplayed on the screen% Z CRCauses:• The target checker is not saved as the number of the checker specified by thesending command.• The edge threshold specified by the sending command is not between 001 or 1and 255.