C500BC061 Omron, C500BC061 Datasheet - Page 78

• Manufacturer Part Number: C500BC061
• Description: BACKPLANE
• Manufacturer: Omron

Specifications of C500BC061

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Communications Protocol
3-2
3-2-1
62
Level 3
RI
MI
QQ
Header
Header
Code
Code
I/O TABLE READ
I/O TABLE GENERATE
COMPOUND COMMAND
Communications Protocol
@
Block Format
Unit no. 00 to 31
X10
X
1
X10
X
0
X
Name
Name
Header
FCS calculation range
The host computer has initial transmission priority. Data transfer between the
host computer and the Host Link System is, therefore, initiated when the com-
puter sends a command to a PC in the Host Link System.
A set of data in a transmission is called a block. The data block sent from the host
computer to the Host Link System is called a command block. The block sent
from the Host Link System to the computer is called a response block. In a multi-
ple-link communications system, each block starts with a unit number and a
header, and ends with a Frame Checksum (FCS) code and a terminator (: and
CR). In a single-link system, however, each block starts with only a header, and
ends with only a terminator. The terminator in the command block enables the
PC to send a response. The terminator in the response block enables the host
computer to send another command. Examples of communications are in-
cluded at the end of Section 4 Commands and Responses.
A block is usually made up of one unit called a frame, but long blocks of data
(over 131 characters) must be divided into more than one frame before trans-
mission. In a multiple-link system, the first frame can have up to 131 characters,
and subsequent frames can have up to 128 characters. In a single-link system,
however, every frame (the first included) has up to 128 characters. The data
must then be divided into more than one frame when there is a block consisting
of more than 131 characters in a multiple-link system, and of more than 128
characters in a single-link system. In this case, the beginning and intermediate
blocks end with a delimiter (CR), instead of a terminator (:CR).
X
Text
Valid
Not valid
Valid
RUN
RUN
PC Mode
PC Mode
Valid
Not valid
Valid
MNTR
MNTR
X
FCS
Valid
Valid
Valid
PROG
PROG
X
*
Terminator
All: C120, C200H/HS/
HX/HG/HE, C500,
C1000H, C2000H
All: C120, C200H/HS/
HX/HG/HE, C500,
C1000H, C2000H
All: C120, C200H/HS/
HX/HG/HE, C500,
C1000H, C2000H
Applicable
Applicable
Section 3-2
CR
PCs
PCs