Simex SIN-8, User Manual

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User manual - MODULE SIN-8
filter setting (F) t
0
, t
1
input signal
frequency
input type
0
125
µ
s
4 kHz electronic input
1
50,0
µ
s
10 kHz
... ... ...
electronic
255 12,75 ms 40 Hz or contact input
Tab. 5.1. Time periods t
0
,t
1
depend on filtered frequency.
Forcing of 0xFF address
New devices has set to Modbus addresses 0xFE. To enhance system installation
process special operation mode has been developed. It allows to force address 0xFF in single
module using internal momentary switch mounted on module mainboard (Figure 4.2).
To change address of the device to FFh, wait for a moment after power up until green
LED (RUN) starts flashes. Next press and hold push-button about 4 seconds until green LED
will lights permanently, then release push-button.
The device changes its MODBUS address to FFh and waits for a new address
(readdressing). Green LED (RUN) stay permanently on until readdressing via RS-485, or
power off. While module is in this state it is possible to control its inputs, and communication is
possible using temporal address FFh.
At this moment MASTER controller should find new device and readdress it (to address
other than 0xFF and 0xFE). After remote readdressing green LED indicator starts to flashes
again.
Simultaneously with change of device address, baud rate is changed to 9600 bit/s.
Required transmission speed (1200 bit/s. to 115200 bit/s.) can be set by write to register 22h.
After change of transmission speed the device sends the answer with new baud rate. While
installation of the new network it is recommended to readdress all devices using baud rate
9600 bit/s, and next change speed of all devices simultaneously, using BROADCAST query
(with address 00h).
6. THE MODBUS PROTOCOL HANDLING
Transmission parameters: 1 start bit, 8 data bits, 1 stop bit, no parity control
Baud rate: selectable from: 1200 to 115200 bits/second
Transmission protocol: MODBUS RTU compatible
The device parameters and display value are available via RS-485 interface, as HOLDING-
type registers (numeric values are given in U2 code) of Modbus RTU protocol. The registers
(or groups of the registers) can be read by 03h function, and wrote by 06h (single registers)
accordingly to Modbus RTU specification. Maximum group size for 03h function can not
exceeds 12 registers (for single frame).
The device interprets the broadcast messages, but then do not sends the answers.
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