Watlow CLS200, MLS300 and CAS200 - Manual (Page 35)

Chapter 2: Modbus-RTU Protocol
Communications Specification 29
operation, or power-up.
Subfunction Data Field (Query) Data Field (Response)
x00 0C x00 00 CRC Error Count
x0D Return Bus Exception Error Count
• The response data field returns the quantity of Modbus-RTU
exception responses returned by the slave since its last
restart, clear counters operation, or power-up.
Subfunction Data Field (Query) Data Field (Response)
x00 0D x00 00 Exception Error
Count
x0E Return Slave Message Count
• The response data field returns the quantity of messages
addressed to the slave, or broadcast, that the slave has pro-
cessed since its last restart, clear counters operation, or
power-up.
Subfunction Data Field (Query) Data Field (Response)
x00 0E x00 00 Slave Message Count
x0F Return Slave No Response Count
• The response data field returns the quantity of messages
addressed to the slave for which it returned a no response
(neither a normal response nor an exception response),
since its last restart, clear counters operation, or power-up.
Subfunction Data Field (Query) Data Field (Response)
x00 0F x00 00 Slave No Response
Count
x0F Force Multiple Coils
• Forces each coil (registers 00001 to 09999, the coils) in a sequence
of coils to either ON or OFF. When broadcast, the function forces
the same coil references in all attached slaves.
x10 Preset Multiple registers
• Presets values into the sequence of holding registers (registers 40001
to 49999). When broadcast, the function presets the same register
references an all attached slaves.
NOTE
The function will override the controller’s memory protect
state. The preset values will remain valid in the registers
until the controller’s logic next solves the register contents.
The register values will remain if they are not programmed
in the controller’s logic.