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Chapter 4: PLC Communications
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.
Address
SC80
SC81
SC82
SC83
SC84
SC86
SC87
SC88
SC90
SC91
SC92
SC93
SC94
SC95
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
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CLICK PLUS PLC Hardware User Manual, 1st Edition, Rev. B – C2-USER-M
Nickname
_WLAN_Ready_Flag
ON when WLAN is Ready, does not indicate Busy Status
_WLAN_Error_Flag
ON when there is a WLAN error. SD213 will contain the error information.
_WLAN_Connection_Limit ON when all of WLAN server connections are busy.
_WLAN_IP_Resolved
ON when WLAN IP Address is assigned
_WLAN_Connected
ON when WLAN is connected to the access point.
_WLAN_DHCP_Enabled
ON when WLAN is configured for DHCP.
_WLAN_DNS_Success
ON when WLAN DNS Lookup was successful.
_WLAN_DNS_Error
ON when WLAN DNS Lookup was an error.
_Port_1_Ready_Flag
ON when Port 1 is ready.
_Port_1_Error_Flag
ON when Port 1 has a communication error.
_Port_1_Clients_Limit
ON when Port 1 is communicating with 3 clients.
_Port_1_IP_Resolved
ON when Port 1 obtains an IP address.
_Port_1_Link_Flag
ON when Port 1 is connected to an Ethernet network.
_Port_1_100MBIT_Flag
ON when Port 1 is communicating at 100Mbps.
the Send instruction.
System Control Relays
Description
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