COMAC CAL FLOW 38 User Manual

Manual FLOW 38 Page 32 (total 54) COMAC CAL s.r.o.
Communication
If the flow meter is ordered with communication, it is possible to choose either MODBUS-RTU or
MBUS protocols. RS485 is the physical layer of both protocols. In MODBUS-RTU protocol, it is possible
to set parity and the number of stop bits. The parity of MBUS protocol is fixed to EVEN and the number of
stop bits to 1. Due to the existing requirements for MBUS protocol and MBUS physical layer, it is necessary
to use an interior expansion card. In this case, besides parity and stop bits, the transfer rate is fixed to 2400Bd
as well.
The flow meter address can be in the range of 0 – 255. The MBUS protocol supports the broadcast
address 254.
If communication was not ordered.
Idle state basic indications on display
Basic indications in idle state can be influenced and modified in such a manner that the data needed
by the user can be found on the first two lines on the display. Whereas the order of the other items is
retained. If you want to change a setting, press the E and or buttons and select the data on the line
which is then confirmed by the E button. The customer can select from these indications, namely both
on the first and the second lines.
Address 0 - 255
Transfer rate 1200Bd –
9600Bd
parity: N – no parity
E – even
O – odd
Number of stop
bits 1/2
Date and time
Volume [customer]
Total volume
Volume (-) direction
Volume (+)direction
Flow bargraph
Flow
line 1
line 2

COMAC CAL FLOW 38 Specifications

General

Brand	COMAC CAL
Model	FLOW 38
Category	Measuring Instruments
Language	English