IDEC SX5L Series - Manual (Page 48)

4: S OFTWARE S PECIFICATIONS
SX5L C OMMUNICATION T ERMINAL U SER ’ S M ANUAL 4-13
Pt100 Ω Input Functional Block
Four input channels 0 through 3 of Pt100 Ω resistance thermometers correspond to output variables nvoPT[0] through
nvoPT[3], respectively. When detecting any change in measured temperature, this functional block sends a corresponding
output network variable to the network.
Initial Status Transmission
This functional block sends output network variables to the network within 3 seconds after powerup. The delay depends on
a random number based on the Neuron ID, and differs on each node.
The sending time can be delayed by changing the nciPwrup value designated in the Node Object functional block. At sys-
tem startup, if the SX5L sends output network variables before the addressee device is ready to receive communication, set
the nciPwrup to a larger value.
The preset value for nciPwrup can be between 0 and 60 seconds (0.1-sec increments). The sending time is determined by
the sum of the nciPwrup value and a random number.
Event-driven Transmission
When receiving a request (polling) from the network or when detecting a change larger than the value designated by
nciMinDelta[0] through nciMinDelta[3], this functional block sends a corresponding output network variable.
The resistance value of the Pt100 Ω resistance thermometer connected to channel 0 is converted to a value between 0 and
+50°C (SX5L-SBPT04X1) or between –20 and +80°C (SX5L-SBPT04Y1), and the resultant output network variable
nvoPT[0] is sent to the network. Channels 1 through 3 work similarly with nvoPT[1] through nvoPT[3].
I/O Name Type Description
Output Network Variable
nvoPT[0] SNVT_temp_p Corresponds to channel 0
nvoPT[1] SNVT_temp_p Corresponds to channel 1
nvoPT[2] SNVT_temp_p Corresponds to channel 2
nvoPT[3] SNVT_temp_p Corresponds to channel 3
Configuration Property
nciMaxStsSendT1 SCPTmaxSndT
nvoPT[0] to nvoPT[3] hear tbeat transmission inter val
(factor y setting: 3 minutes)
nciMinSendT1 SCPTminSndT
nvoPT[0] to nvoPT[3] minimum transmission inter val
(factor y setting: 1 second)
nciMinDelta[0] SCPTsndDelta
Minimum change to send nvoPT[0]
(factor y setting: 0°C)
valid for ever y input level
nciMinDelta[1] SCPTsndDelta
Minimum change to send nvoPT[1]
(factor y setting: 0°C)
valid for ever y input level
nciMinDelta[2] SCPTsndDelta
Minimum change to send nvoPT[2]
(factor y setting: 0°C)
valid for ever y input level
nciMinDelta[3] SCPTsndDelta
Minimum change to send nvoPT[3]
(factor y setting: 0°C)
valid for ever y input level
PT
nvoPT[0]
nvoPT[1]
nvoPT[2]
nvoPT[3]