Omron E3X-DRT21 Operation Manual page 43

Explicit Message Communications
Read (ON/OFF) Incident
Light Level
Batch Read (ON/OFF)
Incident Light Levels
Read Threshold Setting
Batch Read Threshold
Settings
32
Number of Sensors That Can Communicate
Bits 08 to 12 give the number of Sensors that are currently able to communi-
cate in hexadecimal. This setting enables the user to check how many Sen-
sors are communicating normally when an error occurs.
Mobile Console Communications Flag
Bit 13 turns ON when the Mobile Console is connected to the Communication
Unit. When the Mobile Console is connected, explicit message communica-
tions cannot be used.
Sensor Communications Error Flag
Bit 14 turns ON when the number of Sensors registered as connected does
not match the number of Sensors that can communicate, or when a communi-
cations error occurs after communications have been established with the
Sensors.
Sensor Communications Flag
Bit 15 turns ON when communications are established with the Sensors.
Reads the incident light level of the Sensor for the unit number specified in the
instance ID. The data is given as a 2-byte (4-digit) hexadecimal value, and
negative data is expressed as its two's complement.
Data for the Read ON/OFF Incident Light Level commands can be read when
using an E3X-DA6-P Sensor only. For details on ON/OFF incident light levels,
refer to Appendix B Monitoring Incident Light Levels of E3X-DA6-P Sensors.
Reads as a batch the Sensor data starting from unit number 1 for the number
of Sensors specified as connected. The data is given as hexadecimal values,
with 16 bits of data for each Unit. Negative data is expressed as its two's com-
plement.
Unit number 1
Unit number 2
incident light level incident light level
Units numbers specified as number of connected Sensors: N Units
The Batch Read Incident Light Level command cannot be used when one or
more E39-TM1 Terminal Block Units is connected.
Data for the Batch Read ON/OFF Incident Light Level commands can be read
only if all Sensors are E3X-DA6-P Sensors. The command cannot be used if
one or more Sensors other than E3X-DA6-P Sensors are connected. For
details on ON/OFF incident light levels, refer to Appendix B Monitoring Inci-
dent Light Levels of E3X-DA6-P Sensors.
Reads the threshold setting of the Sensor for the unit number specified in the
instance ID. The data is given as a 2-byte (4-digit) hexadecimal value, and
negative data is expressed as its two's complement.
Reads as a batch the Sensor data starting from unit number 1 for the number
of Sensors specified as connected. The data is given as hexadecimal values,
with 2 bytes (4 digits) of data for each Unit. Negative data is expressed as its
two's complement.
Unit number 1
Unit number 2
threshold setting
threshold setting
Units numbers specified as number of connected Sensors: N Units
Section 2-6
Unit number N + 1
Unit number
incident light level
N incident
light level
Unit number N – 1
Unit number
threshold setting
N threshold
setting