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Remote I/O Allocations Section 4-3
Bit Arrangements for Each Type of Data
The bit arrangements for status data and I/O tag settings are shown below.
Status Details
The following tables show the status details.
General Status (1 Byte) Attribute: Non-safety Data
Bit Content Description
0 Input Power Supply Voltage Status
OFF: Normal power supply is ON.
ON: Power supply voltage error or
power supply is OFF.
Indicates the status of the power supply voltage for inputs.
This bit is OFF when local input power supply voltage (V1,
G1) is being applied normally, or when local inputs are not
being used.
1 Output Power Supply Voltage Status
OFF: Normal power supply is ON.
ON: Power supply voltage error or
power supply is OFF.
Indicates the status of the power supply voltage for outputs.
This bit is OFF when local output power supply voltage (V2,
G2) is being applied normally, or when local outputs are not
being used.
2 Standard I/O Communications Error
Status
OFF: No error
ON: Error
Indicates if there is any error in standard I/O communica-
tions.
“Error” indicates that an error has been detected in one or
more connections.
This bit is OFF when communications are not established or
when normal communications are in progress. For Control-
lers that support EtherNet/IP, the status of this bit is an OR
of the DeviceNet or EtherNet/IP standard communications
status.
3 Standard I/O Communications Status
OFF: I/O communications stopped or
error
ON: I/O communications in progress
Indicates whether standard I/O communications are in
progress.
This bit is ON if normal communications are in progress for
all connections.
Example: This bit is ON when two Slave I/O blocks are set
and communications are established for only one of them
and not the other. This bit is OFF, however, when communi-
cations are normal for one and a communications error
occurs for the other. For Controllers that support EtherNet/
IP, the status of this bit is an AND of the DeviceNet or Ether-
Net/IP standard communications status.
4 Safety I/O Communications Error Sta-
tus
OFF: No error
ON: Error
Indicates if there is any error in Safety I/O communications.
This bit is OFF when communications are not established
(i.e., when d@ is not displayed at the 7-segment display) or
while normal communications are in progress. ON when a
communications error occurs at even one connection (i.e.,
when d5, d6, or dA is displayed at the 7-segment display).
5 Run Status
OFF: Not RUN Mode
ON: RUN Mode
Indicates the operating mode of the NE1A-series Controller.
When the NE1A-series Controller is Operating as a Safety
Master Only
This bit is OFF when a communications error occurs at even
one connection (i.e., when d5, d6, or dA is displayed at the
7-segment display). This bit is ON when all Safety Master I/
O communications are normal.
When the NE1A-series Controller is Operating as a Safety
Master and a Safety Slave
This bit is ON when all Safety Master I/O communications
are normal and there is no error in any Safety Slave commu-
nications (i.e., when dA is not displayed at the 7-segment
display). OFF at all other times.
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