PLX31-EIP-ASCII4 Prosoft Gateway Germany

Description

PLX31-EIP-ASCII4 Main Technical Indicators
a) Accuracy level: 0.2, 0.5
b) Input, output, and auxiliary power supply parameters
c) Input frequency: 50Hz ± 5Hz
d) Overload input: Current: 2 times continuous 30 times for 1 second
Voltage: 2 times continuous
e) Absorbed power: Voltage circuit: ＜ 0 5VA/450V
Voltage circuit: ＜ 0.2VA/100V
Current circuit: ＜ 0.1 VA/5A
f) Response time: ≤ 350ms
g) Output load: Current: When the auxiliary power supply is ≥ 24V, RL ≤ 650 Ω;
When the auxiliary power supply is+12V or+15V, RL ≤ 300 Ω;
Voltage: RL ≥ 2k Ω
h) Power frequency withstand voltage: input/output/between enclosures: AC 2kV/min
i) Insulation resistance: ≥ 20M Ω
j) Impulse voltage: 5kV/1.2-50 μ S (peak)
k) Working environment: Temperature: -10~50 ℃ Humidity: 10~90% (without condensation)
l) Storage conditions: Temperature: -40~70 ℃ Humidity: 10~95% (without condensation)

PLX31-EIP-ASCII4 Query

This function allows you to obtain the ON/OFF status of logic coils (Modbus 0x range) used to control discrete outputs from the addressed server only. Broadcast mode is not supported with this function code. In addition to the server address and function fields, the message requires that the information field contain the initial coil address to be read (Starting Address) and the number of locations that are interrogated to obtain status data. The addressing allows up to 2000 coils to be obtained at each request; however, the specific server device may have restrictions that lower the maximum quantity. The coils are numbered from zero; (coil number 1 = zero, coil number 2 = one, coil number 3 = two, and so on). The following table is a sample read output status request to read coils 0020 to 0056 (37 coils) from server device number 11.

An example response to Read Coil Status is as shown in the table below. The data is packed one bit for each coil. The response includes the server address, function code, quantity of data characters, the data characters, and error checking. Data is packed with one bit for each coil (1 = ON, 0 = OFF). The low order bit of the first character contains the addressed coil, and the remainder follows. For coil quantities that are not even multiples of eight, the last characters are filled in with zeros at high order end.

The quantity of data characters is always specified as quantity of RTU characters, that is, the number is the same whether RTU or ASCII is used. Because the server interface device is serviced at the end of a controller’s scan, data reflects coil status at the end of the scan. Some servers limit the quantity of coils provided each scan; thus, for large coil quantities, multiple PC transactions must be made using coil status from sequential scans.