11: PING I NSTRUCTION11-2 WEB S ERVER CPU MODULE U SER ’S M ANUAL FC9Y-B1278Notes:• When the system program version is 100, do not specify the same remote host number in multiple PING instructions. When thesystem program version is 100 and a data register is specified as S1, do not store the same remote host number used by theother PING instructions in the user program to the data register.• When a data register is specified as S1, do not change the data register value while PING instruction is executed.• The Web server CPU module does not respond to a ping packet that is sent by itself.The operation status includes the operation transition state (status code) and the error detail (error code). The statuscode can be obtained by masking the least 4 bits of the operation status. The error code is stored in the least 4 bits of theoperation status.Note: If the status code is anything other than the codes listed above, an error of PING instruction is suspected.Programming WindLDR1. Select Configuration from the WindLDR menu bar, and then click Network Management.The Function Area settings dialog box appears.2. Enter the PING timeout. The valid timeout range is between 1 and 30 seconds. The default timeout is 1 second.Status Code(Decimal) Operation Transition State Description16 Preparing transmission From turning on the start input for a PING instruction, until the pingpacket is sent out to the specified remote host32 Waiting for response From sending the ping packet to the specified remote host, until theresponse is received64 PING instruction complete The execution of the PING instruction is completed, allowing for thenext transmission to be processedError Code Error details Completion output0 Normal ON (The status code is 64)1 - -2 Timeout error ON3 The host name of the target remote host could not be resolvedwith DNS ON4 The specified remote host does not exist in the remote host list ON5 Multiple PING instructions are executed simultaneously ON6 Parameter error ONPhone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
