4-9
4-3 Initialization
No. Item Description
33 BCC calculation formula
34
35
36
39
BCC code type
Send timer value
Reserved
Reserved
Calculation method to check for transmission error.
0: Add
D1 + D2 + ... + Dn
1: Add and invert
Inversion of (D1 + D2 + ... + Dn)
2: EOR
D1 EOR D2 EOR ... EOR Dn
3: CRC * When CRC is selected, specify "BCC Code Format" to "0: Binary."
CRC-16:X
16
+X
15
+X
2
+1
Designates the code type of BCC data.
0: Binary
1: ASCII
2: EBCDIC
The timer value for monitoring transmission since the data send request has been
sent from the CPU module onto the RS-232C line until sending is completed.
Normally set to 100 (1 second) (in 0.01-second steps).
Not used.
D1 D2 Dn
Note 1: Parameter Nos. 16 to 35 are valid even if changed after opening.
After opening, if parameter Nos.16 to 35 are changed and a setup error occurs, or if other parameters are
changed, an open error results and communication “OK” is turned OFF.
Note 2: If you use “EBCDIC” at parameter No. 16 and/ or 34, make sure to select “8 bit” at parameter No. 5.
Note 3: This module ignore data when error detected while receiving data.
We recommend to use No. 6 (Parity), No. 31 (BCC) to detect data error if you use this module on noise
environment.
In this case, external device also support parity, BCC.
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