Datexel reserves its rig t to modify t e c aracteristics of its products totally or in part wit out warning at any time.
pag 4/4
ED.11.06 REV.01
RIF. FW : 3310
CALIBRATION
T e procedure of calibration is performed in factory on all t e modules during t e testing p ase. However it can be convenient to make anot er
calibration of t e module according to t e requirements of t e user. To make t is, it is necessary to use precision instruments and to correctly perform
all t e necessary steps, because any error reduces t e accuracy and t e good operation of t e device.
To re-calibrate t e device, follow t is procedure:
1 – Turn on t e device in INIT condition
2 – Connect a calibrator to t e c annel #0.
3 – Program t e input type to be calibrated
4 – Set t e calibrator at 0V or 0mA
5 – Write on t e “Test” register (40001) t e value 20.
6 – Set t e calibrator to t e full-scale value (10V or 20mA)
7 – Write on t e “Test” register (40001) t e value 30.
8 – Repeat point 3 to 7 for eac input type to be calibrated.
PROCEDURES
HOW TO USE THE “INIT” FUNCTION
If t e exact configuration of a module is unknown, it can result impossible to establis a communication wit it.
T e “INIT” function gives a solution to t is t rouble:
- Connect to t e RS485 net only t e device to configure.
- Turn off t e device.
- Connect t e INIT pin (D) to t e GND pin (C).
- Turn on t e device.
- Ensures t at t e “PWR” green LED on t e front of t e enclosure is lig ted.
If not, control t e voltage supply connections ( I and J pins ) and RS485 net connections ( A and B pins).
If t e supply connection is rig t, and t e led still unlig ted, it can be necessary to invert t e RS485 pins connection.
- Set t e communication port to t ese values:
baud-rate = 9600 bps
parity = None
n° bits = 8
stop bits = 1
- T e device now communicates at t e address 01 wit t e RTU protocol.
- Read or program t e desired settings on t e registers:
40006 : “Communication” for t e baud-rate setting
40007 : “Address” for t e net address of t e device
- Turn off t e device.
- Disconnect t e INIT pin from t e GND pin.
- Turn on t e device.
- Set t e communication port at t e baud-rate programmed in t e 40006 register.
- T e device now communicates wit t e addressprogrammed in t e 40007 register.
NOTE: T e default manufacturer programmation is t e following:
- Address : 01
- Baud-rate : 38400 bps
- Protocol : RTU
WATCHDOG
T e modules as been provided of a Host Watc dog timer w ic , w en it is enabled, makes to start t e alarm eac time t e communication between
t e module and t e ost is inactive for a period time greater t en t e programmed one. W en t e alarm goes on, t e values of t e outputs are
automatically converted to t e values set as ‘safety value’, t at corresponding to t e state in w ic t e outputs must be putted, and t erefore t e
actuators are putted, to avoid damages to t e system in case of failure. Moreover, under t e alarm condition t e green LED on t e front of t e
enclosure is blinking and t e “Watc dog Event” coil is forced to 1.
To return from t e alarm condition, reset t e coil “Watc dog Event” coil: t e LED stop blinking and it is possible to set t e outputs.
T ere is also a Module Watc dog timer t at monitor t e internal CPU work and is active w en t e CPU don't function correctly for any reason, and
resets t e module. After t e reset, all outputs will assume t eir initial default value (“power up value”), t at may be different to t e output value after t e
reset.
SYNCHRONISM
T e Sync ronism function is performed by a command sent to all devices connected on t e net. W en t e devices receive t e Sync command, all
input states are saved in t e relative register, to be read after time. Doing t is, it is possible to read t e value of all inputs at t e Sync command time.
To send t e sync ronism command, write t e value 10 in t e “Test” register (40001) at t e address 255.
NOTE: T e sync values are not saved in EPROM.
