Справочник Пользователя для Siemens M7-400
Glossary
Glossary-19
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
A5E00069467-07
System function block
A system function block (SFB) is a
³
function block integrated in the operating
system of the CPU that can be called in the STEP 7 user program like a function
block (FB), as required. The associated instance data block is in working
memory.
block (FB), as required. The associated instance data block is in working
memory.
Temperature coefficient
Parameter in STEP 7 for analog input modules when measuring temperatures
with a resistance thermometer (RTD). The temperature coefficient you select de-
pends on the resistance thermometer being used (to DIN standard).
with a resistance thermometer (RTD). The temperature coefficient you select de-
pends on the resistance thermometer being used (to DIN standard).
Transmission rate
Rate of data transmission (bit/s)
Two-conductor/three-conductor/four-conductor connection
Method of connection to the module – for example, of resistance
thermometers/resistors to the front connector of the analog input module or of
loads at the voltage output of an analog output module.
thermometers/resistors to the front connector of the analog input module or of
loads at the voltage output of an analog output module.
Two-wire transmitter/four-wire transmitter
Kind of transmitter (two-wire transmitter: supply (via terminals of the analog input
module; four-wire transmitter: supply via separate terminals of the transmitter)
module; four-wire transmitter: supply via separate terminals of the transmitter)
Ungrounded
Without galvanic connection to ground
User program
The user program contains all the statements,
³
declarations and data for signal
processing required to control a system or process. It is assigned to a
programmable module (CPU, FM, for example) and can be structured in smaller
units (blocks).
programmable module (CPU, FM, for example) and can be structured in smaller
units (blocks).
Varistor
Voltage-dependent resistor