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Precautions when Reusing Programs from Earlier Models Section 2-4
Relationship to the 1:N Host Link/1:1 Host Link Setting
The following table shows the allowed Host Link format (1:N Host Link/1:1 Host
Link) settings for each Host Link model compatibility setting.
Settings for an Example Unit Replacement
Use the following settings when the existing host computer was created for a
system with C500-LK103/LK203 Host Link Units and/or 3G2A5-LK101/LK201
Host Link Units, a new Serial Communications Board or Unit (Ver. 1.2 or later)
is being used, and the Host Link format is 1:1 Host Link.
• Host link 1:N format/1:1 format setting: 1 (1:1 Host Link format)
• Host link model compatibility mode setting: 3 (C mode (C500/C120))
2-4-2 C-series Host Link Units with 1:1 Host Link Format Selected
Using the CPU Unit's Built-in Peripheral Port or RS-232C Port
Only the 1:N Host Link format is supported by the CPU Unit’s built-in periph-
eral port and RS-232C port. A host computer program cannot be used if it was
developed for a 1:1 Host Link.
Using a Pre-Ver. 1.2 Serial Communications Board or Unit
Only the 1:N Host Link format is supported by Pre-Ver. 1.2 Serial Communica-
tions Boards and Units. A host computer program cannot be used if it was
developed for a 1:1 Host Link.
Using a Serial Communications Board or Unit with Version Number 1.2 or Later
The Serial Communications Boards and Units with version number 1.2 or later
can be set to operate in 1:1 Host Link mode, so a host computer program
developed for a 1:1 Host Link with C-series PLCs (C200H, C1000H, and
C2000H) can be reused in a CS/CJ Series Host Link. (The 1:1 Host Link for-
Host link model
compatibility mode
Host link format
A mode (CS, CJ, and C)
and B mode (CVM1/CV)
Only the 1:N Host Link format can be used.
C mode (C500/C120)
and D mode (C200H)
Either the 1:N Host Link format or 1:1 Host Link format
can be selected.
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