Masibus CDU-LCD, User Manual

Page: 26 / 32

Model: CDU-LCD
Doc. Ref. no.:- mMP/om/601
Issue no.00.06
User’s Manual Page 26 of 32
8.8 Info
40201 Sr No. Set Serial No -
40203 DP Log Show DP Log -
40205 RH+T Log Show RH+T Log -
40207 DP Read or Write Retrieved index -
40209 RH+T Read or Write Retrieved index -
40211 DI Read or Write Retrieved index -
8.9 Exceptional Response
CODE MEANING
01
Function code Invalid. It must be 03, 04, 06 or 16.The function code received in
the query is not allowable action for the slave.
02
Illegal address value. The data address received in the query is not an
allowable address for the salve.
03
Illegal data value. A value contained in the query data field is not an allowable
value for the salve.
Table13
9. COMMUNICATION PROTOCOL-DNP 3
9.1 Introduction
The unit can be connected in RS-485 communication data link either in multi drop or
repeat mode. Each unit must have unique Destination ID. Entire range of addresses
(1 to 247) may be used. Before starting any communication, choose a baud rate
compatible to the host computer. The serial protocol used is DNP 3.
9.2 Analog Input
Sr.
No
Parameter Description
DNP 3
Point no. Parameter
Type
Access
1 Differential Pressure _ PV with time stamp 1 Integer R
2 Temperature _ PV with time stamp 2 Integer R
3 Humidity _ PV with time stamp 3 Integer R
4 Error Code* 4 Integer R
5 Power On Time stamp 5 Integer R
6 Door Open Close DI
#
6 Integer R
Table 14
* Error Code:
1 - RH+T Sensor Break,
2 - Differential Pressure Sensor Break,
3 - Data Flash Not Working,
4 - Memory full (Applicable only if Log Mode Type is HOLD)
9 - Multiple Errors
#
Door Open Close DI: 0 - Open
1 - Close