GDS C1, Инструкция по эксплуатации

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18
!
!

Turning
Acknowledge OFF
allows the common Horn relay to drive devices other
than horns or sirens such as a light or a fan.

Display Alm YES forces the LCD to display the Bar Graphs screen upon any new
alarm. This feature is offered to satisfy applications requiring channels in alarm to be
displayed automatically (all channels are displayed on the Bar Graphs screen).
2.3.4 COMM PORT MENUS
The system Comm Port menu allows setting RTU
Slave ID
address,
Slave Baud
rate,
Parity and UART Timer for the comm2 slave Modbus serial port (comm1 master port
ID settings are per channel as described in section 2.2.4). This slave port may be used to
transfer C1 data to a host device such as a PC, PLC, DCS or even another C1. The slave
port is addressable, allowing many C1 controllers to be connected to a single RS-485
cable. The
UART Timer setting is disabled with 00 seconds entered. Entering a value
causes the comm2 slave Modbus serial port to reinitialize if no modbus query is
processed within this time period. This ensures against serial port lockup. Section 5 of
this manual provides important information describing how to interface to the C1’s
Modbus slave port.
The
Mastr TO
(master time out) and
Mastr PR
(master poll rate) menu items affect the
C1’s master Modbus port. Time out sets length of time in milliseconds before a
communications error. Three consecutive timeout errors must occur before a
communication error is indicated. This item is useful for optimizing throughput to the C1
from other slave RTU’s.
Poll Rate sets frequency of data requests to the RTU’s in
milliseconds. This is useful when an RTU is limited in how fast it may respond to
consecutive data requests.
The
Echo ACK
(echo acknowledge) menu allows alarm reset / alarm acknowledge
functions be sent from the modbus master port to connected modbus slave devices having
modbus coil 2001 assigned as the reset / acknowledge coil. This menu may be set to
OFF
,
LCL
(local) or
MB/LCL
(modbus/local). Off disables the feature and 2001 coils of
slave devices are unaffected.
LCL
only writes to the 2001 coils of connected RTU’s
when the local Reset pushbutton is pressed.
MB/LCL
writes these coils it this C1’s 2001
coil has been reset via mobus AND when the local pushbutton is pressed. The MB/LCL
option is useful if C1’s are being cascaded from and HMI or other modbus master. A
short time delay between reset of remote RTU’s and the primary C1 may occur since
remote resets are processed first.
IMPORTANT! ALL MODBUS 2001 COILS ARE WRITTEN BY THIS
FEATURE. DO NOT CONNECT DEVICES WITH 2001 COILS
CONTROLLING OTHER CRITICAL EVENTS!
2.3.4a MASTER PORT RADIO SETUP MENU
The 10-0288 RF900 radio modem option may be connected to the comm1 master port
and receive wireless data transmissions from up to sixteen of our GASMAX ECX
wireless sensor transmitters. It is not possible to also use the comm1
master port to
communicate to “wired” modbus transmitters and if any channels are set for modbus they
will report “comm. error”.