System Control Relays

Topic: CL109

System Control Relays (SC)

Address

System Nickname

Description

Read/Write

SC1

_Always_ON

Always ON.

Read

SC2

_1st_SCAN

ON for the First Scan only.

Read

SC3

_SCAN_Clock

Changes from OFF to ON or ON to OFF every Scan.

Read

SC4

_10ms_Clock

Changes from OFF to ON and ON to OFF every 5ms.

Read

SC5

_100ms_Clock

Changes from OFF to ON and ON to OFF every 50ms.

Read

SC6

_500ms_Clock

Changes from OFF to ON and ON to OFF every 250ms.

Read

SC7

_1sec_Clock

Changes from OFF to ON and ON to OFF every 500ms.

Read

SC8

_1min_Clock

Changes from OFF to ON and ON to OFF every 30 seconds.

Read

SC9

_1hour_Clock

Changes from OFF to ON and ON to OFF every 30 minutes.

Read

SC10

_Mode_Switch

ON when PLC Mode Switch is in RUN position.

Read

SC11

_PLC_Mode

ON when the PLC is in RUN mode.

Read

SC19

_PLC_Error

ON when an Error occurs.

Read

SC20

_I/O_BUS_Error

ON when an Error occurs.      

Read

SC21

_System_Config_Error

ON when an Error occurs.     

Read

SC22

_I/O_Module_Error

ON when an Error occurs.      

Read

SC23

_Flash_Memory Error

ON when an Error occurs.

Read

SC24

_Project_File_Error

ON when an Error occurs.

Read

SC25

_Project_File_Ver_Error

ON when an Error occurs.

Read

SC26

_Watchdog_Timer_ Error

ON when an Error occurs.

Read

SC27

_Lost_SDRAM_Data

ON when an Error occurs.

Read

SC28

_Battery_Low_Voltage

ON when the Battery Voltage is Low (<2.5V).  When this bit is ON, replace the Battery as soon as possible.

Read

SC29

_Battery_Replacement

ON when the anticipated replacement date has passed.  When this bit is ON, replace the Battery as soon as possible.  Set the new Battery installation date and Battery replacement date in the Battery Backup Setup window (Drop-down Menu: Setup > Battery Backup Setup).

Read

SC30

_Run Edit Project Error

The RUN Time Edit program download failed. The program download was not completed. The PLC will continue in Run with the previous program

Read

SC31

_Sub_CPU_FW_Ver_Error

Firmware in Sub CPU does not match the Main CPU. Update Firmware again.

Read

SC32

_C2DCM_FW_Ver_Error

The C2-DCM contains a firmware version that is incompatible the main processor. Connect the CLICK software to the CLICK PLC and update the firmware of the CPU module.

Read

SC40

_Division_Error

ON when a value is being Divided by "0".

Read

SC43

_Out_of_Range

ON when there is a Data Overflow, Underflow, and Data Convert Error.

Read

SC44

_Address_Error

ON when an Address is not valid.

Read

SC46

_Math_Operation_Error

Data Registers used in the Math formula have Invalid values.  SC50 is turned to ON, the PLC is put in Stop Mode.

Read

SC50

_PLC_Mode_Change_to_STOP

When in Run mode it sets mode to Stop.

Read/Write

SC51

_Watchdog_Timer_Reset

When SC51 is turned to ON, Watchdog Timer resets to "0".

Read/Write

SC53

_RTC_Date_Change

Set this bit to apply SD29, SD31, SD32

Read/Write

SC54

_RTC_Date_Change_Error

Status after Data Change 1=Error

Read

SC55

_RTC_Time_Change

Set this bit to apply SD34, SD35, SD36

Read/Write

SC56

_RTC_Time_Change_Error

Status after Time Change 1=Error

Read

SC60

_BT_Disable_Pairing

Bluetooth Pairing can be Disabled by setting this bit ON.

Read/Write

SC61

_BT_Activate_Pairing

Bluetooth Pairing can be activated by setting this bit ON. It will also be set ON when activated by the Pairing button.

Read/Write

SC62

_BT_Paired_Devices

Indicates that at least one Bluetooth device has been paired. This bit also indicates the Bluetooth blink LED state.

Read

SC63

_BT_Pairing_SW_State

Status of the Bluetooth button state 1=Pressed

Read

SC64

Remote PLC Enabled

The remote PLC feature is enabled

Read

SC65

_SD_Eject

Set this bit ON to ask the system prepare to safely remove the SD card. The bit will turn OFF when the SD card is ready to be removed.

Read/Write

SC66

_SD_Delete_All

Set this bit ON to ask the system to delete all log files on the SD card. The bit will turn OFF when the action is completed.

Read/Write

SC67

_SD_Copy_System

Set this bit ON to ask the system to copy these System Records from the PLC to the SD card:
Error History, Failed Password Attempts Record, Email Log, Allow List Denied Record

The bit will turn OFF when the action is completed. .

Read/Write

SC68

_SD_Ready_To_Use

ON when the SD card is "Ready to Use"

Read

SC69

_SD_Write_Status

ON when writing data to the SD card

Read

SC70

_SD_Error

ON when there is a SD card error. SD69 will contain the error information.

Read

SC75

_WLAN_Reset

Set this bit ON to ask the system to Reconnect to the configured WLAN. ModbusTCP, MQTT and DHCP will be momentarily interrupted. The bit will turn OFF when the action is completed.

Read/Write

SC76

_Sub_CPU_Reset

Set this bit ON to ask the system to Reset operation of the sub-systems: WLAN, Bluetooth, SD Card. WLAN will reconnect, Bluetooth will disconnect current session, SD Card will be remounted. ModbusTCP, MQTT and DHCP will be momentarily interrupted. The bit will turn OFF when the action is completed.

Read/Write

SC80

_WLAN_Ready_Flag

ON when WLAN is Ready, does not indicate Busy Status

Read

SC81

_WLAN_Error_Flag

ON when there is a WLAN error. SD213 will contain the error information.

Read

SC82

_WLAN_Connection_Limit

ON when all of WLAN server connections are busy.

Read

SC83

_WLAN_IP_Resolved

ON when WLAN IP Address is assigned

Read

SC84

_WLAN_Connected

ON when WLAN is connected to the access point.

Read

SC86

_WLAN_DHCP_Enabled

ON when WLAN is configured for DHCP.

Read

SC87

_WLAN_DNS_Success

ON when WLAN DNS Lookup was successful.

Read

SC88

_WLAN_DNS_Error

ON when WLAN DNS Lookup was an error.

Read

SC90

_Port_1_Ready_Flag

ON when Port 1 is Ready, does not indicate Busy Status

Read

SC91

_Port_1_Error_Flag

ON when Port 1 has an Error with at least one server

Read

SC92

_Port_1_Connection_Limit

ON when all of Port 1 server connections are busy.

Read

SC93

_Port_1_IP_Resolved

ON when Port 1 IP Address is assigned

Read

SC94

_Port_1_Link_Flag

ON when Port 1 Link is good.

Read

SC95

_Port_1_100MBIT_Flag

ON when Port 1 Link is 100 Mbps.

Read

SC96

_Port_1_DHCP_Enabled

ON when Port1 is configured for DHCP.

Read

SC97

_Port_1_DNS_Success

ON when Port1 DNS Lookup was successful.

Read

SC98

_Port_1_DNS_Error

ON when Port1 DNS Lookup was an error.

Read

SC100

_Port_2_Ready_Flag

ON when Port 2 is Ready.

Read

SC101

_Port_2_Error_Flag

ON when Port 2 has an Error.

Read

SC102

_Port_3_Ready_Flag

ON when Port 3 is Ready.

Read

SC103

_Port_3_Error_Flag

ON when Port 3 has an Error.

Read

SC111 _EIP_Con1_ConOnline ON when a Class 1 Implicit Connection is active. Read
SC112 _EIP_Con1_Error ON when a Class 1 Implicit was rejected because of a configuration error. Read
SC113 _EIP_Con1_Originator_Run ON when a Class 1 Implicit Connection is active and the Originator is including a Status Header indicating its Run/Idle state. Read
SC114 _EIP_Con2_ConOnline ON when a Class 1 Implicit Connection is active. Read
SC115 _EIP_Con2_Error ON when a Class 1 Implicit Connection was rejected because of a configuration error. Read
SC116 _EIP_Con2_Originator_Run ON when a Class 1 Implicit Connection is active and the Originator is including a Status Header indicating its Run/Idle state. Read
SC120 _Network Time_Request Set this bit ON to start a NTP Request. Read/Write
SC121 _Network Time_DST

Set this bit ON to add one hour to the current local time for Daylight Savings Time.

Note: Using DST (Daylight Saving Time) adjustments along with Data Logging may cause anomalies in the records. When the system time is adjusted backwards records may be lost or appended to existing files. When the system time is adjusted forward a time gap will appear in the records.

Read/Write
SC122 _Network Time_Processing ON during a NTP Request. Read
SC123 _Network Time_Error ON when the NTP Request had an Error Read
SC131 _Password_Failure_Detect ON when a Login failure has occurred and the SD131 count is not zero. Read
SC132 _Password_Locked_Out ON when too many Login failures have occurred, please wait 10 seconds. Read
SC133 _Port1_AL_Enabled ON when the Allow List feature is enabled on Port1. Read
SC134 _Port1_AL_Denied_Flag ON when a connection has been rejected by the Allow List on Port1. Read
SC135 _WLAN_AL_Enabled ON when the Allow List feature is enabled on WLAN Port. Read
SC136 _WLAN_AL_Denied_Flag ON when a connection has been rejected by the Allow List on WLAN Port. Read

SC140

_S0_P1_Ready_Flag

ON when DCM0 (Slot 0) Port 1 is Ready.

Read

SC141

_S0_P1_Error_Flag

ON when DCM0 (Slot 0) Port 1 has an Error.

Read

SC142

_S0_P2_Ready_Flag

ON when DCM0 (Slot 0) Port 2 is Ready.

Read

SC143

_S0_P2_Error_Flag

ON when DCM0 (Slot 0) Port 2 has an Error.

Read

SC144

_S1_P1_Ready_Flag

ON when DCM1 (Slot 1) Port 1 is Ready.

Read

SC145

_S1_P1_Error_Flag

ON when DCM1 (Slot 1) Port 1 has an Error.

Read

SC146

_S1_P2_Ready_Flag

ON when DCM1 (Slot 1) Port 2 is Ready.

Read

SC147

_S1_P2_Error_Flag

ON when DCM1 (Slot 1) Port 2 has an Error.

Read

SC202

_Fixed_Scan_Mode

ON when the Fixed Scan Mode is selected.

Read

SC203

_Battery_Installed

ON when Battery is Installed.

Note: The CLICK CPU modules cannot detect if a Battery is Installed automatically.  If a Battery is Installed but this bit is not ON, open the Battery Backup Setup window (Drop-down Menu: Setup > Battery Backup Setup) and check the radio button for Battery Installed on the top.

Read

Note: The Nicknames of all System Control Relays and System Data Registers start with an Underscore ( _ ) to indicate that they are System Nicknames. On the other hand, all user-defined Nicknames can not start with an Underscore. Therefore, System Nicknames can be easily identified by the Underscore at the beginning of the Nickname.

 

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