KEYENCE DL-DN1 - Manual (Page 60)

3-3 Explicit Messaging
3-32 - DeviceNet Compatible Network Unit DL-DN1 User’s Manual (FD-S) -
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*12 An ASCII character string is sent back in response data (4 bytes). The data
types is DINT.
For "FD-S", the response is "46442D53h".
*13 An ASCII character string is sent back in response data (16 bytes). The data
types is STRING.
For "FD-SA*A", the response is "46442D53412A41000000000000000000h".