Com Port Status Indicators
The CLICK PLUS PLC has the following System Control Relays to indicate the status of
Com Port 1 and the WLAN port.
System Control Relays
Address
Nickname
Description
SC80
_WLAN_Ready_Flag
ON when WLAN is Ready, does not indicate Busy Status
SC81
_WLAN_Error_Flag
ON when there is a WLAN error. SD213 will contain the error information.
SC82
_WLAN_Connection_Limit ON when all of WLAN server connections are busy.
SC83
_WLAN_IP_Resolved
ON when WLAN IP Address is assigned
SC84
_WLAN_Connected
ON when WLAN is connected to the access point.
SC86
_WLAN_DHCP_Enabled
ON when WLAN is configured for DHCP.
SC87
_WLAN_DNS_Success
ON when WLAN DNS Lookup was successful.
SC88
_WLAN_DNS_Error
ON when WLAN DNS Lookup was an error.
SC90
_Port_1_Ready_Flag
ON when Port 1 is ready.
SC91
_Port_1_Error_Flag
ON when Port 1 has a communication error.
SC92
_Port_1_Clients_Limit
ON when Port 1 is communicating with 3 clients.
SC93
_Port_1_IP_Resolved
ON when Port 1 obtains an IP address.
SC94
_Port_1_Link_Flag
ON when Port 1 is connected to an Ethernet network.
SC95
_Port_1_100MBIT_Flag
ON when Port 1 is communicating at 100Mbps.
Example Program
The ladder program to use these Receive and Send instructions are easy. You just need one
NO (Normally Open) contact instruction to check if the com port is ready to receive or send
data.
When Com Port 1 is ready, the Receive
instruction is executed. This also applies to
the Send instruction.
CLICK PLUS PLC Hardware User Manual, 1st Edition, Rev. B – C2-USER-M
4-38
Chapter 4: PLC Communications
