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APPX
Appendix 1 Details of Remote I/O Signals
105
A
APPENDICES
Appendix 1
Details of Remote I/O Signals
This section describes the details of remote I/O signals of master module for the bridge module.
Remote I/O signals
DP/DN short error
DP/DN short error (RXn1) turns on when a short-circuit occurs in the transmission cables (DP, DN) or the maximum supply
current is exceeded.
■
Turning off DP/DN short error
To turn off DP/DN short error (RXn1), after eliminating the short-circuit in the transmission cables (DP, DN) or adjusting the
current to be within the specification range, perform either of the following operations.
Until then, this signal remains on.
• Powering off and on the bridge module
• Turning on and off Error reset request flag (RY(n+1)A, RY(n+3)A, RY(n+5)A, RY(n+7)A, RY(n+D)A)
Transmission cable voltage drop error
Transmission cable voltage drop error (RXn3) turns on when the 24VDC external power supply voltage drops.
■
Turning off Transmission cable voltage drop error
To turn off Transmission cable voltage drop error (RXn3), after eliminating the drop of the 24VDC external power supply
voltage, perform either of the following operations.
Until then, this signal remains on.
• Powering off and on the bridge module
• Turning on and off Error reset request flag (RY(n+1)A, RY(n+3)A, RY(n+5)A, RY(n+7)A, RY(n+D)A)
DP/DN disconnection error
DP/DN disconnection error (RXn4) turns on when disconnection occurs in the transmission cables (DP, DN) or the slave
module is disconnected.
■
Turning off DP/DN disconnection error
To turn off DP/DN disconnection error (RXn4), after eliminating the disconnection in the transmission cables (DP, DN) or that
of the slave module, perform either of the following operations.
Until then, this signal remains on.
• Powering off and on the bridge module
• Turning on and off Error reset request flag (RY(n+1)A, RY(n+3)A, RY(n+5)A, RY(n+7)A, RY(n+D)A)
Latest error ID simple information
When DP/DN disconnection error (RXn4) or Slave module alarm signal (RX(n+1)0) turns on, following latest error ID is stored
in Latest error ID simple information (RXn6 to RXnF).
• 0000H to 00FFH: ID of the output slave module
• 0200H to 02FFH: ID of the input slave module or I/O combined slave module
When DP/DN short error (RXn1), Transmission cable voltage drop error (RXn3), or bridge module hardware failure is
occurred, latest error ID is not stored in Latest error ID simple information (RXn6 to RXnF).
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