IDEC SX5L Series - Manual (Page 65)

A PPENDIX
A-4 SX5L C OMMUNICATION T ERMINAL U SER ’ S M ANUAL
SNVT_switch
SNVT index 95. The SX5L uses SNVT_switch mainly for digital input and output statuses. When the input variable has
(state) = 1, digital output is on. When (state) = 0, digital output is off. When the digital input is on, an output network vari-
able is sent with (state) = 1, (value) = 1. When the digital input is off, an output network variable is sent with (state) = 0,
(value) = 0.
SNVT_temp_p
SNVT index 105, used for heating, ventilation, and air-conditioning (HVAC) applications. The SX5L uses SNVT_temp_p
for output network variables nvoPT[0] through nvoPT[3] of the Pt100
Ω Input functional block. When the measured tem-
perature value exceeds the limit, 0x7FFF is sent.
SNVT_time_sec
SNVT index 107, used to measure elapsed time. The SX5L uses SNVT_time_sec for configuration property nciPwrup to
determine the transmission delay immediately after powerup.
Subnet ID
The second layer of the device address. Up to 255 subnets can be defined within a single domain.
Topology
The physical arrangement of devices in a communication network, such as bus, ring, and star topology.
XIF
An acronym for External Interface File, whose filename has extension XIF. A XIF file contains network variable informa-
tion, a part of hardware parameter, and communication parameter concerning a particular node. The XIF file is mainly
supplied from a manufacturer, and can also be imported from the device depending on the type of management tool.
Measurement Type Size and Structure Valid Type Range Note
Switch
2 bytes
typedef struct {
unsigned value;
signed state;
} SNVT_switch;
0 .. 100% Resolution: 0.5%
0 .. 1, 0xFF
0: off
1: on
0xFF: undefined
Measurement Type Size and Category Valid Type Range Type Resolution Note
Temperature 2 bytes (signed long)
–273.17 .. +327.66
degrees C
0.01 degree C 0x7FFF: invalid data
Measurement Type Size and Category Valid Type Range Type Resolution Note
Elapsed Time 2 bytes (unsigned long) 0.0 .. 6553.4 sec 0.1 sec 0xFFFF: invalid data