Panasonic ELC500 User Manual page 59

■Settings of TCP ULP timeout and TCP resend timer
With TCP/IP communication, it resends command at setting times automatically as below.
Number of resend = TCP ULP timeout / TCP resend timer
Ex.) TCP ULP timeout: 30-sec
0
↓
st
Send 1
Point
If you increase the number of resend, it will reduce a communication error.
Take measures by PC side too.
Up to 12 times can be set. It doesn't resend it in case of using UDP/IP.
TCP resend timer: 10-sec
TCP ULP = 30 sec.
TCP resend timer = 10 sec
10
↓
nd
Send 2 Send 3
Resend 30/10 sec = 3 times
51
20 30
↓ ↓
rd
Send 4
ELC500 Control unit
th