REMOTE RESET
The R terminals can be connected to a normally open pushbutton to remotely reset a connected
777-P/P1 overload.
DIAGNOSTIC INDICATOR LIGHTS (CIO-EN)
The unit is energized when 24 VDC is applied between V+ and V- on the 5-pin connector on the front
of the CIO-EN module. The MODBUS MODULE NETWORK STATUS (MNS) LED and OVERLOAD
COMM. (OLC) STATUS LED will flash until communication is established. The MNS LED indicates
the state of an upstream Modbus connection to the module. The OLC LED indicates the state of the
overload connection to the module. For a complete description of the indicator LED’s see tables 2
and 3 below:
TABLE 2: MNS LED State Table
For this state:
LED is:
To indicate:
Not Powered
Off
The CIO-EN is not powered.
Upstream Modbus/RTU
Comm. Operational
Green
The CIO-EN is communicating with an upstream Modbus/RTU device
and the CIO-EN is powered.
Upstream Modbus/RTU
Comm. NOT Operational
Flashing
Green
The CIO-EN is powered but upstream communications are not
established.
TABLE 3: OLC LED State Table
For this state
LED is:
To Indicate:
Not Powered
Off
The CIO-EN is not powered.
Overload Comm.
Operational
Green
The CIO-EN is communicating with an overload device and the CIO-EN
is powered.
Overload Comm. NOT
Operational
Flashing
Green
The CIO-EN is powered but overload communications are not
established.
NOTE: If an unrecoverable error has occurred with the nonvolatile memory (which stores the
device settings), the CIO-EN will enter a lockdown mode and flash both the OLC and MNS
LEDs every second. The remote reset input must be triggered in order to reset all settings to
factory defaults. The connected 777-P/P1 will not be reset when this occurs.
The CIO-EN Ethernet jack on top of the unit contains LED’s to represent communication and activity
over the network. Tables 4 and 5 describe the LED functions.
TABLE 4: Yellow Ethernet LED
For this state:
LED is:
To indicate:
No Link
Off
The CIO-EN is not connected to an Ethernet network.
Active Link
Solid
Yellow
The CIO-EN is connected to an Ethernet network.
TABLE 5: Green Ethernet LED
For this state
LED is:
To Indicate:
No Network Activity
Off
The CIO-EN is not transmitting or receiving any data over
Ethernet.
Network is Actively
Operational
Green
The CIO-EN is transmitting or receiving data over Ethernet.
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