Service Manual
Page 37 of 50
6.1.2 Berkel
6.1.2.1 Data Format
2400 Baud (select 2400, 4800 or 9600)
7 data bits (select 7 or 8)
Even parity (select Even, None or Odd parity)
1 stop bit (select 1 or 2 stop bit)
6.1.2.2 Handshaking
For PC DB25 serial port connector: Jumper 4 to 5, and 6, 8, & 20 together.
For PC DB9 serial port connector: Jumper 4 to 6 and 7 to 8.
6.1.2.3 Command Descriptions
Command
COMMENTS
ENQ (05h)
Starts the communication sequence
ACK (06h)
Data Available
CAN (18h)
Repeat weighing
NAK (15h)
No acknowledgement
NUL (00h)
No data available
DC1 (11h)
Data Request
STX (02h)
Start of text
ID
Information byte, broken down into the following bits:
Bit
Capacity
2
1
0
0
0
1
15kg x 0.005kg
0
1
0
30lb x 0.01lb
0
1
1
6kg x 0.002kg
Bit 3
- Logic 1
Bit 4
- Logic 1 means under/over range
Bit 5
- Logic 1
Bit 6
- Logic 1 indicates non-AVR capacities
Weight
5 bytes with MSD first
BCC
Block Check Character calculated as the even column parity
(Longitudinal Redundancy Check) of all characters except the STX
and ETX.
ETX (03h)
End of text
STX Z NUL NUL NUL NUL NUL ETX BCC
Command String to Zero the scale from the EPOS, note that the BCC
in this case will be “Z”
STX N NUL NUL NUL NUL NUL ETX BCC
Command String to Tare the scale from the EPOS, note that the BCC
in this case will be “N”
CR (0dh)
Data received and compared correctly
