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or drbA, the corresponding low or high alarms are blocked until the alarm condition first clears. If the alarm condition
is satisfied again, the alarm will work.
3.3.3 Setpoints switch
If an I2 module is installed in MIO slot (or bAud=1 and I2 installed in COMM slot). User can connect external on off
switch to realize some control function. Set Et = rest, can switching program run and stop. For AI-526, or AI526P when
its Pno=0, set Et = SP1.2, can switching between setpoint 1 and setpoint 2.
3.3.4 Communication function
S or S4 module can be installed at COMM slot to communicate with a computer. The instrument can be controlled
by computer. AI instruments can be connected to the computer through RS232 or USB communication port. Every
communication port of a computer can connect up to 60 AI instruments, or 80 AI instruments if a repeater is installed.
A computer with 2 communication ports can connect up to 160 instruments. Please note that every instrument
connecting to the same communication line should be set to a unique communication address. If the number of
instrument are enough, 2 or more computers can be used and a local network can be set up.
AIDCS application software, a distributed control system software developed by Yudian, can control and manage 1
～
160 AI instruments, record the data, generate and print reports. If users want to develop their own distributed control
system by themselves, the communication protocol of AI instruments can be free offered. There are many famous
