User manual

7
SV Alarm Type Alarm Output Function
value is lower than the setting value SV+(AL-L).
12
Hysteresis lower-limit alarm output:
This alarm output operates if PV value is lower than the
setting value SV-(AL-H). This alarm output is OFF when PV
value is higher than the setting value SV-(AL-L).
ON
OFF
A
L-H
A
L-L
Attention: AL-H and AL-L include AL1H, AL2H and AL1L, AL2L. When the 1
st
group output is set to alarm
output, AL1H (1024H) and AL1L (1025H) will be used. When the 2
nd
group output is set to alarm output, AL2H
(1026H) and AL2L (1027H) will be used.
7 LED DISPLAY
1. When power is normal, POWER LED will be lit.
2. LED will be lit after power on. Within one second after power on, communication protocol will be
displayed; and at the following second after communication protocol displayed, communication
address will be displayed. After that, LED will all be lit to show operation is normal.
3. When control action is executing, RUN LED will be lit.
4. When input, memory, or communication happens to error, ERROR LED will be lit.
5. When output is acted, the corresponding LED will be lit.
6. When PID program is auto adjusting parameter, AT LED will blink.
7. RX LED will blink when receiving communication signal and TX LED will blink when transmitting
communication signal.
Protocol Format of LED Display When Power On
AT TX RX O1 O2 Err Run
000:2400bps 001:4800bps 010:9600bps
011:19200bps 100:38400bps
Parity 00:None 01:Even
10: Odd
0: ASCII
1: RTU
0:2 Stop bit
1:1 Stop bit
Communication address display: AT (bit 6) and Run (bit 0) will combine to binary code.
8 PASSWORD FUNCTION
The default of password will not operate. After writing 4-byte password into specific communication
address, password function will be activated. There are three levels for password protection:
1. Level1: only LED status, settings, and input values can be read via communication. It is unable
to revise anything.
2. Level2: only LED status, settings, and input value can be read via communication. Also, it is
able to revise setting.
3. Level3: all the settings can be read via communication, but it is only revisable for settings and
AT adjustment.
4. No password function.
Once password is set (106EH~1070H), the controller will enter level 1. For entering another level,
please key in corresponding password in 106BH~106DH (see Address and content of Data
Register). After power off, it will get back to level one. If password protection function shall be
dismissed, it is necessary to clear all password setting.
To enable password function, it is necessary to write corresponding password (106EH~1070H)
when password status is dismissed. To dismiss password levels, intended password setting should
be write in specific function address 106EH~1070H.
Password status can be read from 106EH~1070H. Statuses corresponding to each bit are shown as
the following table:
Bit b0 b1 b2 b3 b4 b5 b6
Status Level 1 Level 2 Level 3 Level 1 locked Level 2 locked Level 3 locked Unlock